Term
| What can explain the relationship between the sine of the angle of incidence and the sine of the angle of refraction of light rays traveling from a vacuum into another medium? |
|
Definition
|
|
Term
| What is the sine of the angle of incidence divided by the sine of the angle of refraction? |
|
Definition
|
|
Term
| According to Snell, what happens as the angle of incidence increases? |
|
Definition
| the angle of refraction increases |
|
|
Term
| What happens to light moving from a substance with a smaller index of refraction to a larger index of refraction? |
|
Definition
| it is bent towards the normal |
|
|
Term
| What occurs when Earth blocks sunlight from the moon? |
|
Definition
|
|
Term
| angle of incidence where the refracted ray lies along the boundary of the two media |
|
Definition
|
|
Term
| occurs when light passes from a more optically dense medium (higher index of refraction) to a less optically dense medium (lower index of refraction) at an angle so great (greater than critical angle) that there is no refracted ray, so all light reflects back into the region of the higher index of refraction |
|
Definition
| total internal reflection |
|
|
Term
| What has total internal reflection given rise to? |
|
Definition
|
|
Term
| What has fiber optics made possible? |
|
Definition
| to use light instead of electricity to transmit voices and data |
|
|
Term
| What hits the internal boundary of the optical fiber at an angle greater than the critical angle, so all of the light is reflected and none is transmitted through the boundary so the light maintains its intensity the distance? |
|
Definition
| light traveling through the transparent fiber |
|
|
Term
| separation of light into a spectrum by refraction |
|
Definition
|
|
Term
| What has one of the highest refractive indices of any material, so it disperses light more than most materials? |
|
Definition
|
|
Term
| The higher the index of refraction, what happens? |
|
Definition
| the more light it will dispense |
|
|
Term
| piece of transparent material that is used to focus light and form an image |
|
Definition
|
|
Term
| thicker at the center than the edges, converging lenses because they refract parallel light rays so that they meet at a point (ex- magnifying glass) |
|
Definition
|
|
Term
| thinner in the middle than at edges, diverging lens because rays passing through the lens spread out |
|
Definition
|
|
Term
| What kind of image does a concave lens form? |
|
Definition
| virtual, erect, and reduced |
|
|
Term
| What is the focal length of a concave lens? |
|
Definition
|
|
Term
| What kind of image is formed of an object located beyond the focal point of a convex lens? |
|
Definition
| real, inverted, and smaller |
|
|
Term
| What kind of image is made of an object closer than the focal point of a convex lens? |
|
Definition
| virtual, upright, and enlarged |
|
|
Term
| What can be used to ignite paper? |
|
Definition
|
|
Term
| inability of spherical lens to focus all parallel rays at a single point |
|
Definition
| lenses exhibit spherical aberration (like mirrors) |
|
|
Term
| What happens to the light we see? |
|
Definition
| it is transferred through the cornea and lens and focuses on the retina at the back of the eye and specialized cells in the retina absorb this light and send information about the image along the optic nerve to the brain |
|
|
Term
| What focuses most of the light entering the eye? |
|
Definition
|
|
Term
| Why does the cornea focus most of the light entering the eye? |
|
Definition
| the air-cornea surface has the greatest difference in indices of refraction |
|
|
Term
| process where muscles surrounding lens contract or relax changing shape of lens which changes the focal length of the eye |
|
Definition
|
|
Term
| focal length of the eye is too short to focus light on the retina and images are formed in front of the retina (cannot see distant objects) |
|
Definition
| nearsightedness or myopia |
|
|
Term
| What can correct nearsightedness(myopia)? |
|
Definition
|
|
Term
| focal length of the eye is too long, images are formed past the retina (cannot see objects that are up close) |
|
Definition
| farsightedness or hyperopia |
|
|
Term
| What can correct farsightedness(hyperopia)? |
|
Definition
|
|
Term
| Who invented the telescope in 1608? |
|
Definition
|
|
