Physics II final Exam #1

Question 1

What causes chromatic aberration of a converging lens?

Answer 1

different index of refraction for different wavelengths

Question 2

For relaxed viewing with a microscope, the eyepiece is adjusted to place the final image at

Answer 2

infinity

Question 3

What is refraction?

Answer 3

the change in direction of light from one medium into another

Question 4

What causes a change in direction of a light ray?

Answer 4

scattering, reflection, refraction

Question 5

When does TIR occur?

Answer 5

when light goes from high index of refraction to lower index of refraction

Question 6

A virtual image occurs when?

Answer 6

light rays appear to come from a point they didn’t pass through

Question 7

Which types of mirrors always produce upright images?

Answer 7

diverging and plane

Question 8

Which type of mirror can produce a real image?

Answer 8

converging

Question 9

When lens is used in a pinhole camera?

Answer 9

no lens

Question 10

What type of image does a camera record?

Answer 10

real images only

Question 11

When is the lens of the eye most curved?

Answer 11

when looking at near objects

Question 12

What part of the eye causes the most refraction?

Answer 12

the cornea

Question 13

What does the objective lens of a microscope do?

Answer 13

focuses diverging rays into a real image

Question 14

What is the spreading of different wavelengths of light due to slightly different indices of refraction?

Answer 14

dispersion

Question 15

How do raindrops produce a single rainbow?

Answer 15

2 refractions and 1 TIR

Question 16

How can you correct chromatic aberration?

Answer 16

combine a converging and diverging lens

Question 17

When a wave passes through a small opening it spreads to fill the space beyond the opening. This is known as

Answer 17

diffraction

Question 18

In order for a color to be visible in thin film interference, the wavelength of that color must

Answer 18

satisfy the constructive interference conditions

Question 19

In a diffraction grating, the number of slits increases but distance between them remains the same. How does the interference pattern change?

Answer 19

bright fringes get narrower and brighter

Question 20

What causes the colors of a soap bubble or oil slick?

Answer 20

Thin-film interference

Question 21

What kind of lens can correct farsightedness?

Answer 21

converging lenses