Wave speed and the wave equation

Question 1

What are the 2 formulas for the speed/velocity of wave

Answer 1

V = Wavelength/Time period

V = wavelength x frequency

Question 2

What is the formula for Frequency

Answer 2

F = 1/T

Question 3

What is the speed of light

Answer 3

3x10^18 ms^-1

Question 4

Can sound travel through a vacumn and why

Answer 4

sound cannot travel through vacumn because there are no particles to vibrate and transfer their energy from source to detector.

Question 5

What does the sun radiate outwards, and in which direction.

Answer 5

Sun radiates EM waves, in all directions.

Question 6

Define intensity of a progressive wave

Answer 6

Rate at which energy is transferred from one location to another as the wave travels through space.

Question 7

What is the equation of intensity, and the unit of i.

Answer 7

INTENSITY = ENERGY/TIME / AREA

INTENSITY = POWER/AREA

if it spreads out equally in all directions

INTENSITY = POWER/4pie r^2

area = surface area of sphere

units of intensity = Wm^-2

Question 8

Intensity and amplitude relationship

Answer 8

intensity is poportional to amplitude squared

I = A^2

Question 9

What happens to the FREQUENCY when a wave goes from low to high medium or high to low medium.

What happens to frequency when wavelength, speed, amplitude change.

Answer 9

The frequency stays the same ALWAYS

Question 10

what type of wave comes from aerial

Answer 10

EM wave, eg, light wave