Waves Review

Question 1

Waves

Answer 1

disturbance in a medium that results in vibration/oscillation

Question 2

Wave speed (v)

Answer 2

speed at which wave crests move forward

Depends on properties of the medium (tension, density, mass, etc.)

Question 3

Relationship between period (T) & frequency (f)

Answer 3

f = 1/T

Question 4

Relationship between wavelength (λ) & frequency (f)

Answer 4

Question 5

Relationship between speed of light (v) & index of refraction (n)

Answer 5

c = 3.00 x 10⁸ m/s (constant = speed of light in a vacum)

Question 6

Equation for how wavelength changes between media

Answer 6

Question 7

wavelength inversely proportional to ___ but directly proportional to ___

Answer 7

wavelength inversely proportional to index of refraction but directly proportional to speed

Question 8

Does wavelength or frequency effect the speed that electromagnetic radiation travels?

Answer 8

NO

All electromagnetic radiation travel at the speed of light (regardless of wavelength or frequency)

Question 9

Transverse wave

Answer 9

particles vibrate in a perpendicular direction relative to the motion of the wave

Question 10

Longitudinal wave

Answer 10

particles vibrate in along the same direction as the motion of the wave

Question 11

Which type of wave can propagate through a fluid?

Answer 11

Only longitudinal waves

Question 12

Beats

lower frequency (f) =

Answer 12

lower frequency (f) = lower tone, flatter

Question 13

Beats

higher frequency (f) =

Answer 13

higher tone, sharper

Question 14

Beats

When mass of tuning fork increased, what happened to the frequency?

Answer 14

frequency decreased because inertia increased

Question 15

Beats

When frequencies of tuning forks are CLOSE vs. FAR how is the sound?

Answer 15

close → gradual loud to soft sounds

far apart → rapid change from in sync to opposite

Question 16

Sound

Answer 16

longitudinal pressure wave in air (or in a medium that is able to vibrate)

Question 17

Huygen’s Principle

Answer 17

every point on a wave front can be considered a new wave source that spreads out in the forward direction at the speed of the wave itself. The new wavefront is the envelope of all wavelets–tangent to all of them.