Sound & Light

Question 1

In the EM spectrum, which waves are the smallest?

Answer 1

gamma

Question 2

In the EM spectrum, which waves are the largest?

Answer 2

radio

Question 3

EM spectrum

Answer 3

(largest ) 
radio
microwaves
IR
ROYGBIV
UV
x-rays
gamma 
(smallest)

Question 4

Velocity of sound = ?

Answer 4

v = √(Κ/ρ)

K = bulk modulus (coefficient of stiffness)
ρ = density of medium

Question 5

Velocity of wave = ?

Answer 5

v = fλ

Question 6

c = ?

Answer 6

Speed of light = 3 x 10^8 m/s

Question 7

Light is ____ when it goes through a prism

Answer 7

spread out (NOT interference)

Question 8

Velocity of light through medium = ?

Answer 8

v = c/n

c = speed of light
n = index of refraction

(n = c/v)

Question 9

If n1 ___ n2 light bends toward the normal

Question 10

If n1 < n2, θ1 ___ θ2

Answer 10

>

Question 11

If n1 > n2, θ1 ___ θ2

Question 12

critical angle (θcrit) is the value of ___ for which θ2 = ___

Answer 12

θ1

90 degrees

Question 13

Snell’s law

Answer 13

n1sin θ1 =n2sin θ2

Question 14

θcrit = ?

Answer 14

θcrit = arcsin(n2/n1)

Question 15

___ frequency
___ wavelength

= more refraction of visible light (_ _ _)

Answer 15

high
short

= BIV

Question 16

___ frequency
___ wavelength

= less refraction of visible light (_ _ _)

Answer 16

low
long

= ROY

Question 17

Total internal reflection can only occur when n1 ___ n2

Answer 17

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