Waves Basics And Wave Properties

Question 1

What is transverse?

Answer 1

The vibrations are at right angles to the direction of travel

Question 2

What is longitudinal?

Answer 2

The vibrations are along the same direction as the direction of travel

Question 3

What is the frequency?

Answer 3

The number of waves per second

Question 4

What is frequency measured in?

Answer 4

Hertz

Question 5

How is the speed of wave calculated?

Answer 5

Speed of wave= frequency X wavelength

Question 6

What is wavelength measured in?

Answer 6

Metres

Question 7

What is the amplitude?

Answer 7

The high of the a wave

Question 8

What is speed measured in?

Answer 8

Seconds

Question 9

What is 1kHz (kilohertz) equal to?

Answer 9

1000Hz

Question 10

What is 1MHz (1 megahertz) equal to?

Answer 10

1000000 Hz

Question 11

What is the speed of light?

Answer 11

3x10 to the power of 8

Or 300 000 000 m/s

Question 12

What does amplitude depend on?

Answer 12

The energy in the vibrations

Question 13

What happens to the sound when we increase the frequency?

Answer 13

It gets louder

Question 14

All waves can be what?

Answer 14

Reflected, reflected and diffracted

Question 15

What is reflection of light?

Answer 15

It’s what allows us to see objects. Light bounces off them into our eyes. When a beam of light reflects from an uneven surface, the light reflects off at different angles. When it reflects from an uneven surface than it’s all reflected at the same angle and you get a clear reflection

Question 16

What is the law of reflection?

Answer 16

Angle of incidence= angle of reflection

Question 17

To what does the law of reflection apply to?

Answer 17

Every reflected Ray

Question 18

What is total internal reflection?

Answer 18

When a light Ray is able to pass through a fibre by reflecting all its light

Question 19

What does total internal reflection depend on?

Answer 19

The critical angle

Question 20

Where can total internal reflection happen?

Answer 20

When the light Ray travels through a dense material towards a less dense material

Question 21

What happens if the angle of incidence is big enough?

Answer 21

The Ray doesn’t come out at all, but reflects back into the material

Question 22

What does big enough mean?

Answer 22

Bigger than the critical angle for a particular material

Question 23

If the angle of incidence is less than the critical angle…

Answer 23

Most of the light is refracted into the outer layer, but some of it is internally reflected

Question 24

If the angle of incidence is equal to the critical angle…

Answer 24

The Ray would go along the surface

Question 25

If the angle of incidence is greater than the critical angle…

Answer 25

No light comes out m. It’s all internally reflected

Question 26

What do earthquakes and explosions produce?

Answer 26

Seismic waves that travel through the earth

Question 27

What are P waves?

Answer 27

Primary waves
They are longitudinal
They travel through solids and liquids
Faster

Question 28

What are S waves?

Answer 28

Secondary waves
They are transverse
Only travel through solids
Slower