Term
Who is known for the corpuscular theory of light? |
|
Definition
|
|
Term
| Who is known for the wave thoery of light? |
|
Definition
|
|
Term
| Who is creditied as the first to attempt to measure the speed of light? |
|
Definition
|
|
Term
| Who is the first to calculate the speed of light to the number used today astronomically utilizing the orbits of Earth, Jupiter, and Jupiter's moons? |
|
Definition
| Olaf Romer (186,262 miles/sec) |
|
|
Term
| The wavelengths of the visible light spectrum are? |
|
Definition
|
|
Term
What does light stimulate to produce visual effects? |
|
Definition
|
|
Term
| Our eyes are most sensitive to which two colors of the visible light spectrum? |
|
Definition
|
|
Term
| The two colors which are most sensitive to the human eye have wavelengths of? |
|
Definition
|
|
Term
A medium surrounded by air permits light to travel at a speed of 122,127.38 mps. What is the medium? |
|
Definition
186,262 = 1.523 122,127.38 Index of Refraction is Crown Glass |
|
|
Term
| Light is said to behave as a ? |
|
Definition
|
|
Term
| When two waves meet and cancel each other is known as? |
|
Definition
|
|
Term
Destructive interference is the principle phenomenum utilized for? |
|
Definition
|
|
Term
| What type of light source is infinetely small? |
|
Definition
|
|
Term
| A source that has a measurable area is? |
|
Definition
|
|
Term
| UV light has wavelengths below 380 nm. Wavelengths below what number are considered harmful to the human eye? |
|
Definition
|
|
Term
What four things can happen when light strikes an object? |
|
Definition
- Transmission
- Pressure
- Absorption
- Reflection
|
|
|
Term
| A wavelength is measured by the distance between what two points of the same phase? |
|
Definition
Crest to Crest or Trough to Trough |
|
|
Term
| In the study of optics, which are the four general rules of light? |
|
Definition
- Light travels from left to right
- Ligh is always divergent
- When light reaches 20ft. it is considered parallel
- We round the index of air to 1.00 N.
|
|
|
Term
When light travels from a dense to less dense medium it is refracted? |
|
Definition
|
|
Term
| Long UV has a shorter wavelength than? |
|
Definition
| Infared and Visible Light |
|
|
Term
Light which is made up of multiple wavelengths is? |
|
Definition
|
|
Term
| As Opticians we are concerned about protecting our eyes from wavelengths? |
|
Definition
|
|
Term
| The period of a wave is .05 seconds. What is the frequency? |
|
Definition
Frequency = 1 Period 20 cycles per second = Frequency |
|
|
Term
| What are the wavelengths of MID UV B and its affects to the human eye? |
|
Definition
280 nm. to 320 nm. Light rays will partially transmit through the crystalline lens and reach the retina. |
|
|
Term
| A wave has a velocity of 300 ft/sec and a wavelength of 15ft. What is the frequency? |
|
Definition
Velocity = Frequency * Wavelength 300 = F * 15 Frequency = 20 vibrations per sec. |
|
|
Term
| The frequency of a wave is 10 vibrations per second. What is the period? |
|
Definition
Frequency = 1 Period Period = 0.1 Seconds |
|
|
Term
| A wave has a frequency of 15 cycles per second, and a wavelength of 10 ft. What is the velocity? |
|
Definition
Velocity = Frequency * Wavelength Velocity = 15 * 10 Velocity = 150 ft/sec |
|
|
Term
A wave has a velocity of 500 ft/sec and a frequency of 25 cycles per sec. What is the wavelength? |
|
Definition
Velocity = Frequency * Wavelength 500 ft/sec = 25 * Wavelength Wavelength = 20 Ft. |
|
|
Term
| What are the wavelengths of LONG UV A and its affects to the human eye? |
|
Definition
320 nm. to 380 nm. Light rays will transmit through the anterior structures of the eye and reach the retina |
|
|
Term
| What are the wavelengths of SHORT UV C and its affects to the human eye? |
|
Definition
100 nm. to 280 nm. Light rays are absorbed by the conjuctiva and cornea. |
|
|
Term
| What are the wavelengths of VACUUM UV and what happens to its light rays? |
|
Definition
10 nm. to 100 nm. Light rays are absorbed by the atmosphere |
|
|
Term
| What portion of the shadow is known as the partial shadow? |
|
Definition
|
|
Term
| What portion of the shadow is known as the full shadow? |
|
Definition
|
|
Term
| What three types of images are found in plane mirrros? |
|
Definition
- Virtual
- Erect
- Left for right reversed
|
|
|
Term
Define a spherical mirror |
|
Definition
| Polished Opaque objects with a reflection. |
|
|
Term
| Define a virtual image in spherical mirrors |
|
Definition
| Where light rays appear to meet |
|
|
Term
| Define a real image in spherical mirrors. |
|
Definition
Where light rays actually meet |
|
|
Term
| Define center of curvature in spherical mirrors. |
|
Definition
| The center of the sphere from which the mirror is constructed. |
|
|
Term
| For spherical mirrors and lenses all? |
|
Definition
| Real images are inverted and all virtual images are erect. |
|
|
Term
|
Definition
A spherical mirror in which the inside portion is covered with a reflecting materical. CONVERGING. |
|
|
Term
|
Definition
A spherical mirror in which the outside is covered with a reflecting material. DIVERGING. |
|
|
Term
| Define radius of curvature in a spherical mirror. |
|
Definition
Distance from center of curvature to the mirror and is equal to twice the focal length. |
|
|
Term
|
Definition
A postive dioptric value lens which causes parallel incident rays of light to converge. |
|
|
Term
|
Definition
| A negative dioptric value lens which causes parallel incident rays of light to diverge. |
|
|
Term
| Define magnification in lenses and mirros. |
|
Definition
| The ratio of image size to object size also equal to the ratio of image distance to object distance with sign reversed. |
|
|
Term
| With spherical mirrors and lenses... |
|
Definition
Object distance and object size are always plus. |
|
|
Term
| With converging spherical mirrors and lenses... |
|
Definition
| The focal length is always plus |
|
|
Term
| For spherical mirros and spherical lenses; if MAGNIFICATION is greater than 1 then... |
|
Definition
| The image is larger that the object. |
|
|
Term
| For spherical lenses and mirros; if MAGNIFICATION is plus then... |
|
Definition
|
|
Term
| For spherical mirrors and lenses; if IMAGE distance is plus then... |
|
Definition
|
|
Term
| An object that does not transmit light is said to be? |
|
Definition
|
|
Term
| According to Z80.3 ANSI the wavelengths bordering the visible spectrum are... |
|
Definition
|
|
Term
| Fiber optics is a good example of this optical principle. |
|
Definition
| Total internal reflection |
|
|
Term
A transverse wave vibrates to the direction of propogation. |
|
Definition
|
|
Term
| In optics, an object is considered to be at "optical infinity" if the object distance exceeds... |
|
Definition
|
|
Term
| When dealing with concave spherical mirrors; if the object is located between the focal point and the mirrored surface, the image will always be ... |
|
Definition
|
|
Term
| Who is the first to postulate that light is composed of electromagnetic energy? |
|
Definition
|
|
Term
| A small portion of the spectrum such as one wavelength or a small band of wavelengths is... |
|
Definition
|
|
Term
| What is the diagram which shows how light behave? |
|
Definition
|
|
Term
| what is the two most occuped theories? |
|
Definition
- Newton : Corpuscular theory of light
- Huygens: Wave theory of light
|
|
|
