Term
| What is a straight line that represents the linear path of a narrow beam of light? |
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Definition
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Term
| What is bounced back when a refracted ray is bent? |
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Definition
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Term
| What is our major source of light? |
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Definition
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Term
| Why is the sun a luminous source? |
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Definition
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Term
| What is the Moon an illuminated source? |
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Definition
| it is visible as a result of light reflecting off it |
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Term
| What is an incandescent lamp? |
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Definition
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Term
| Why is an incandescent lamp luminous? |
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Definition
| electrical energy heats a thin tungsten wire in the bulb at high temperatures |
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Term
| What is a metal with the highest melting point? |
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Definition
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Term
| What is an example of an illuminated source? |
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Definition
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Term
| allows no transmission of light but some reflection of light |
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Definition
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Term
| What is an example of opaque? |
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Definition
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Term
| What is an example of opaque? |
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Definition
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Term
| What is an example of opaque? |
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Definition
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Term
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Definition
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Term
| What is an example of something that is transparent? |
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Definition
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Term
| transmit light but does not permit objects to be seen clearly through them |
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Definition
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Term
| What is an example of something that is translucent? |
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Definition
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Term
| rate at which light energy is emitted from a luminous source |
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Definition
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Term
| What are the units of luminous flux? |
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Definition
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Term
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Definition
| the measure of the rate at which light rays come out of a luminous source |
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Term
| How many lm does a 100-W incandescent blub emit? |
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Definition
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Term
| illumination of a surface or rate at which light strikes a surface (measure of number of light rays that strike a surface) |
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Definition
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Term
| What is illuminance measured in? |
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Definition
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Term
| What is 1 lx equivalent to? |
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Definition
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Term
| What is illuminance produced by? |
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Definition
| a point source of light that varies inversely as the square of the distance from the light source |
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Term
| What is luminous intensity measured in? |
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Definition
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Term
| Which Danish astronomer was the first to determine that light does travel at a measurable speed? |
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Definition
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Term
| What is the name of one of Jupiter's moons? |
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Definition
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Term
| What did Roemer's calculations estimate the speed of light to be? |
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Definition
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Term
| Why did Roemer get his estimate of the speed of light? |
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Definition
| he determined a 22 minute value for the speed of light crossing the diameter of Earth |
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Term
| What is the actual value for the speed of light? |
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Definition
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Term
| Who was the first American to receive a Nobel Prize by measuring the time it required light to travel between 2 California mountains using mirrors? |
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Definition
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Term
| What was Albert Michelson's calculation of the speed of light? |
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Definition
| (2.997996 + or - .00004) x 10^8 m/s |
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Term
| What committee measured and defined the speed of light in a vacuum (c) to be 299,792,458 m/s? |
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Definition
| The International Committee on Weights and Measurements |
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Term
| In a vacuum, how far does light travel in a year? |
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Definition
| 9.46 x 10^12 km in one year (light year) |
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Term
| bending of light around a barrier |
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Definition
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Term
| Who used a prism to bend white light into a spectrum of colors (ROYGBIV)? |
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Definition
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Term
| Which color has the longest wavelength and the least energy at 700 nm? |
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Definition
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Term
| Which color has the shortest wavelength and greatest energy of 400nm? |
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Definition
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Term
| What are the three primary colors that may be added together to form white light? |
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Definition
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Term
| What color do red and green light produce? |
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Definition
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Term
| What color light do blue and green light produce? |
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Definition
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Term
| What color light do red and blue light produce? |
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Definition
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Term
| What are the three second colors? |
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Definition
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Term
| Why are yellow, cyan, and magenta the second colors? |
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Definition
| they are the combination of two primary colors |
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Term
| What are two colors of light that can be combined to make white light? |
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Definition
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Term
| Which two colors are considered complementary colors? |
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Definition
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Term
| molecule that absorbs certain wavelengths of light and transmits or reflects others |
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Definition
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Term
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Definition
| the des I nit reflect red light to our eyes. the dye molecules in the object absorb the blue and green light and reflect the red light |
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Term
| What is the difference between a dye and a pigment? |
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Definition
| pigments are usually made of crushed minerals rather than plant extracts |
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Term
| What can be seen with a microscope? |
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Definition
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Term
| absorbs only one primary color and reflects two from white light |
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Definition
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Term
| Which color absorbs blue light and reflects red and green light? |
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Definition
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Term
| absorbs two primary colors and reflects one color |
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Definition
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Term
| What are the colors of secondary pigments? |
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Definition
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Term
| Which color absorbs green and blue light? |
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Definition
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Term
| Which color absorbs red and blue light? |
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Definition
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Term
| Which color absorbs red and green light? |
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Definition
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Term
| Primary pigment colors are also what kind of colors? |
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Definition
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Term
| The secondary pigment colors are also what kind of colors? |
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Definition
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Term
| When yellow pigment is mixed with the secondary pigment blue, which absorbs green and red light, all of the primary colors are absorbed. What is the result? |
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Definition
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Term
| What does a color printer use to make a color image on paper? |
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Definition
| yellow, magenta, and cyan dots of pigment |
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Term
| What are finely ground compounds like titanium (IV) oxide (white), chromium (III) oxide (green), and cadmium sulfide (yellow) used to make? |
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Definition
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Term
| What do pigments mix to form? |
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Definition
| suspensions, not solutions |
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Term
| What contains larger particles that will settle out whereas a solution is a homogeneous mixture that doesn't settle out? |
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Definition
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Term
| What is an example of suspension? |
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Definition
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Term
| What is an example of a solution? |
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Definition
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Term
| What two colors are not scattered by the air which is why the Sun looks yellow or orange? |
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Definition
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Term
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Definition
| violet and blue light from the sun are scattered in all directions illuminating the sky |
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Term
| When does photosynthesis take place in leaves of deciduous trees? |
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Definition
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Term
| What absorbs sunlight and creates food for trees? |
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Definition
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Term
| What colors are carotenoids? |
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Definition
| yellow, orange, and brown |
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Term
| What colors are anthocyanns? |
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Definition
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Term
| production of light in a single plane of oscillation |
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Definition
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Term
| Only waves doing what to the axis can pass through? |
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Definition
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Term
| The direction of a polarizing medium is perpendicular to the long molecules is called what? |
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Definition
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Term
| explains the reduction of light intensity as it passes through a second polarizing filter |
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Definition
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