PHYS 214 Exam 5

Question 1

image distance

Answer 1

s’

Question 2

object distance

Answer 2

s (not prime)

Question 3

focal distance

Answer 3

f

Question 4

eye adjusts lens radius

Answer 4

eye focuses vision

Question 5

eye adjusts pupil diameter

Answer 5

eye adjusts brightness

Question 6

property of light that doesn’t change when passing through varying transparent materials

Answer 6

color doesn’t change (related to frequency)

Question 7

radio wave speed

Answer 7

(same as) speed of light

Question 8

loud is to bright as high pitch is to (red or violet)

Answer 8

violet (shorter wavelength)

Question 9

intensity applies to these waves

Answer 9

light and sound

Question 10

Initially unpolarized light passed through three successive high quality Polaroid sheets. Sheets 2 and 3 have axes of polarizations with respect to that of the first polarizer of 45◦ and 90◦, respectively. What fraction of the initial intensity passes through all three sheets?

Answer 10

1/8

Question 11

Initially unpolarized light passed through three successive high quality Polaroid sheets. Sheets 2 and 3 have axes of polarizations with respect to that of the first polarizer of 90◦ and 45◦, respectively. What fraction of the initial intensity passes through all three sheets?

Answer 11

0

Question 12

When viewing an object as a large, right-side up image, at a distance greater than the positive focal length of their converging lenses, the actual real image produced on the retinas is smaller/larger and right-side up/upside-down.

Answer 12

smaller, upside-down

Question 13

property of light that makes fiber optic cables better than copper

Answer 13

frequency (of light)

Question 14

physical phenomenon of internal reflection making fiber opic cables most effective

Answer 14

light from a high index of refraction tries to refract into a lower index material at a a large angle of incidence

Question 15

index of refraction of air

Answer 15

1

Question 16

relationship between speed, wavelength, and frequency

Answer 16

speed = wavelength * frequency

Question 17

radians to degrees

Answer 17

rad * 180 / pi = deg

Question 18

degrees to radians

Answer 18

deg * pi / 180 = rad

Question 19

the number of harmonics of a wave on a string (n)

Answer 19

the number of half-waves of a string (number of periods / 2)

Question 20

transverse magnification (mT) is negative

Answer 20

image is real

Question 21

transverse magnification (mT) is positive

Answer 21

image is virtual

Question 22

transverse magnification definition

Answer 22

ratio of image length to object length

Question 23

destructive wavelength

Answer 23

n + 0.5

Question 24

constructive wavelength

Answer 24

n (no + 0.5)

Question 25

sound waves cannot be _____ but light waves can

Answer 25

polarized

Question 26

time for light to travel in space equation

Answer 26

distance = c * time