Waves

Question 1

What is a wave?

Answer 1

A movement of energy by which the energy moves the waves

Question 2

What is an amplitude, wave length and frequency of a wave?

Answer 2

The amplitude is how tall the wave is, wavelength is how long the wave is from one point to the other and frequency is how many times a wave passes by

Question 3

What is the wavelength and frequency measured with?

Answer 3

Wavelengths are measured with metres and frequency is measured by seconds or Hertz (Hz)

Question 4

What is a longitudinal wave?

Answer 4

A wave that is displaced at the right angle to the direction of the wave

Question 5

What is a longitudinal wave?

Answer 5

When the wave is displaced parallel to the direction of the wave

Question 6

What’s the wave equation?

Answer 6

Speed (V) = Frequency (f) X wavelength(Y)

Question 7

Core practical ripple tank

Answer 7

1. Set up the ripple tank placing a large sheet of paper under it
2. Pour water to a depth of about 5mm in the tank
3. Adjust the height of the wooden rod so that it just touches the surface of the water
   4.Switch on the overhead lamp and the electric motor
   5.Adjust the speed of the motor to produce low frequency water waves
4. Adjust the heigh of the lamp so that the pattern of the waves can be seen clearly on the white sheet
5. Count the number of waves passing through given in seconds
6. Calculate the speed of the waves using the wave equation

Question 8

Measuring waves in a solid

Answer 8

Measuring the frequency speed and wavelength of a wave through a metal rod

1. Suspend a metal rod horizontally using clamp stands and rubber bands
2. Hit one end of the road with a hammer holding a smartphone with a frequency app near the rod and note the peak frequency
3. Measure the length of the road and write it down the wavelengh will be twice the length of the rod

Question 9

What is refraction

Answer 9

It’s when the wave passes through a medium and bends

Question 10

How does refraction happen?

Answer 10

It refracts because the wave travels at a medium and there’s a change in the speed of light between the two materials

Question 11

Examples of longitudinal waves

Answer 11

Sound waves and seismic waves

Question 12

Examples of transversial waves

Answer 12

Light, seismic waves and ripples

Question 13

What’s in the refracted wave example

Answer 13

Glass block with the normal in the model and an incident ray going through with the refracted ray inside and an emergent ray as it leaves

Question 14

What’s reflection?

Answer 14

When a light bounces off a material

Question 15

Rich men in Vegas use X-rated goggles

Answer 15

Radio microwave infrared Visible light ultra violet x ray gamma ray

Question 16

When can a lights speed slow down?

Answer 16

It slows down when going through a medium

Question 17

What can light go through?

Answer 17

Glass, water and air

Question 18

How fast can light and EM spectrum waves travel in a vacuum?

Answer 18

300,000,000 m/s

Question 19

What can be used to split white light

Answer 19

A prism

Question 20

How was infrared discovered

Answer 20

In 1800 by sir Frederick with a red and blue light