P1 - Waves

Question 1

What do waves transfer?

Answer 1

Energy and information

Question 2

In a transverse waves the oscillation is ____________ to the direction of travel

Answer 2

Perpendicular

Question 3

In a longitudinal wave the oscillation is _______________ to the direction of travel

Answer 3

Parallel

Question 4

Can mechanical waves travel through a vacuum

Answer 4

No

They need particles to transfer

Question 5

What type of waves are longitudinal

Answer 5

Sound

Slinky

Seismic waves (p waves)

Question 6

What is the wavelength equal to?

A) amplitude
B) one complete wave
C) frequency

Answer 6

B

Question 7

The greater the amplitude the __________ the energy

Answer 7

Greater

Question 8

What is the frequency of a wave

Answer 8

How many wave crests pass a point in one second.

Question 9

How to calculate the speed of a wave

Answer 9

V = f X wavelength

V - wave speed (m/s)
F - Frequency (hz)
Wavelength - wavelength (m)

Question 10

What’s the wavelength of a longitudinal wave?

Answer 10

Middle of one compression to the next

Question 11

How do mirrors work

Answer 11

Due to the reflection of light

Question 12

Which Ray goes into the plane mirror, which comes away and where do you draw the normal

Answer 12

Incident
Reflected

Perpendicular to the mirror where the incident Ray hit

Question 13

The angle of incidence and reflection are where

Answer 13

Between the Ray of incidence and the normal and vise versa

Question 14

The angle of reflection and incidence are ____________

Answer 14

Equal

Question 15

Name four properties of images in a plane mirror

Answer 15

Virtual
Upright
The same size as the object
The same distance as the object from the mirror

Question 16

What’s the difference between a real and virtual image?

Answer 16

Real images can be formed on a screen because the rays of light that produce the image actually pass through it and virtual images cannot be formed on a screen because the Rays only appear to pass through it

Question 17

What is refraction?

Answer 17

When waves cross a boundary between two substances they change speed and direction. The wavelength changes but the frequency stays the same.

Question 18

What type of waves undergo refraction

Answer 18

All waves

Question 19

When light enters a boundary that is more dense what happens

Answer 19

Slows down and goes closer to the normal

Question 20

When light enters a less dense substance what happens

Answer 20

Speeds up and changes direction away from the normal

Question 21

If the wave is travelling along the normal and crosses a boundary what happens

Answer 21

Continues down the normal

Question 22

What is dispersion

Answer 22

When light rays are shone onto a triangular glass prism we can see a colour spectrum because each colour has different wavelengths.

Question 23

Which colours are refracted the most and least

Answer 23

Violet light is refracted the most

Red light is refracted the least

Question 24

What is diffraction and what waves does it occur in

Answer 24

The spreading of waves as they pass through a gap or around an obstacle, property of all waves

Question 25

Why are radio signals poor in hilly areas

Answer 25

The tv signal (radio wave) diffract around an obstacle such as a hill and if they don’t refract fully they’ll receive weak signals

Question 26

What is the frequency range of the human ear

Answer 26

20 hz and 20,000 hz

Question 27

Give the properties of sound waves

Answer 27

Longitudinal
Need a medium to travel through
Reflections of sound are called echoes

Question 28

What type of surface reflects sound to produce echoes

Answer 28

Flat, hard surfaces can create echoes

Soft surfaces such as curtains or carpets absorb sound

Question 29

The pitch is dependant upon what factor

Answer 29

The frequency

The higher the frequency the higher the pitch

Question 30

What does the volume of a sound depend upon

Answer 30

The amplitude

The higher the amplitude the higher the volume