Refraction and Lenses

Question 1

The bending of light

Answer 1

Refraction

Question 2

The product of the index of refraction of the first medium and the sine of the angle of incidence is equal to the product of the index of refraction of the second medium and the sine of the angle of refraction.

Answer 2

Snell’s law of refraction

Question 3

It is An understanding that light interacts with atoms when traveling through a medium, such that it moves more slowly than in a vacuum

Answer 3

The wave model of light

Question 4

This does not
change when it crosses a boundary

Answer 4

frequency of light, f

Question 5

At a certain angle of incidence known as

Answer 5

critical angle, theta c

Question 6

This occurs when light traveling from a region of a higher index of refraction to a region of a lower index of refraction strikes the boundary at an angle greater than the critical angle, such that all light reflects back into the region of the higher index of refraction

Answer 6

Total internal reflection

Question 7

It is an optical phenomenon in which a distant object appears to be present, even though it is not actually there.

Answer 7

Mirage

Question 8

It is the property by which light spreads out according to its color as it passes through an object.

Answer 8

Dispersion

Question 9

It is a piece of transparent material, such as glass or plastic, that is used to focus light and form an image.

Answer 9

Lens

Question 10

A lens that is thicker at the center than at the edges.

Answer 10

Convex lens

Question 11

A lens that is thinner in the middle than at the edges.

Answer 11

concave lens3

Question 12

It’s often called a converging lens because, when surrounded by material with a lower index of refraction it refracts parallel light rays so that the rays meet
at a point

Answer 12

Convex lens

Question 13

It’s often called a
diverging lens because when surrounded by material with a lower index of refraction rays passing through it spread out.

Answer 13

Concave lens

Question 14

Also known as color fringing, this is a color distortion that creates an outline of unwanted color along the edges of objects in a photograph

Answer 14

Chromatic aberration

Question 15

defect caused by chromatic aberration can be greatly reduced by

Answer 15

achromatic lens

Question 16

a system of two or more lenses, such as a convex lens with a concave lens,
that have different indices of refraction

Answer 16

achromatic lens

Question 17

a remarkable optical device

Answer 17

The eye

Question 18

Myopia, whereby the focal length of the eye is too short to focus light on the retina. Images are formed in front of the retina.

Answer 18

nearsightedness

Question 19

Hyperopia, is a condition in which the focal length of the eye is too long. Images are
therefore formed past the retina.

Answer 19

farsightedness

Question 20

Lenses that are used to magnify distant
objects.

Answer 20

astronomical refracting telescope