Waves

Question 1

What are the two types of wave

Answer 1

Longitudinal
Transverse

Question 2

What is a transverse wave

Answer 2

Oscillations are perpendicular to direction of energy transfer

Question 3

What is a longitudinal wave

Answer 3

Oscillations are parallel to energy transfer

Question 4

Example of transverse waves

Answer 4

Electromagnetic waves
Seismic waves S waves a

Question 5

Examples of longitudinal

Answer 5

Sound waves
Seismic P waves

Question 6

Two parts of a longitudinal wave called

Answer 6

Compressions and rarefactions

Question 7

What is the frequency of a wave

Answer 7

The number of waves that pass a given point per second

Question 8

How does sound waves travel through solid

Answer 8

Particles in solid vibrate and transfer kinetic energy through material

Question 9

What produces seismic waves

Answer 9

Earthquakes

Question 10

What’s a difference between P waves and S waves

Answer 10

P waves travel through solids and liquids
S waves only travel through solids

Question 11

Electromagnetic radiation ordered

Answer 11

Radio waves
Micorowaves
Infrared
Visible light
Uv
X-rays
Gamma rays

Question 12

What do waves do when entering a denser medium

Answer 12

Bend towards normal

Question 13

What health effects can X-rays and gamma rays cause

Answer 13

Mutations in genes as they are ionising radiation
Cancer

Question 14

What is meant by the focal length of a lens

Answer 14

Distance from lens’s to principal focus

Question 15

What determines colour of visible light waves

Answer 15

Frequency and wavelength

Question 16

What do all objects emit and absorb

Answer 16

Infrared radiation

Question 17

What is perfect black body

Answer 17

An object that absorbs all radiation

Question 18

Two factors that effect temp of earth

Answer 18

Rate of absorption and emission of radiation

Question 19

What’s the difference between concave and convex lens

Answer 19

Convex have larger focal length

Question 20

How does a loudspeaker work

Answer 20

Electrical signal sent to voice coil
Create a magnetic field that interacts with the magnetic field of permanent magnet
Causes the voice coil to move back and forth
Causes diaphragm to vibrate

Question 21

What does it mean If there is a large amplitude

Answer 21

Louder

Question 22

Advantages of ultrasound over x-rays

Answer 22

Doesn’t cause gene mutations /cancer

Question 23

How to sound waves travel

Answer 23

Vibration of particles

Question 24

What is the frequency of an ultrasound?

Answer 24

20000hz+

Question 25

What equals angle of reflection

Answer 25

Angle of incidence

Question 26

What do P-wave slow down in?

Answer 26

Liquid outer core of earth

Question 27

Concave lens is always

Answer 27

Diminished
Virtual
Right way up

Question 28

If they are real the rays meet at

Answer 28

A point

Question 29

Order of electromagnetic waves

Answer 29

Radio
Microwave
Infrared
Visible Light
Uv
X-ray
Gamma ray

Question 30

The colour red has low

Answer 30

Frequency and long wavelength

Question 31

What causes electromagnetic waves?

Answer 31

Movement of electrons in energy levels

Question 32

How radio waves produced?

Answer 32

When electrons move back and forth in a circuit

Question 33

The magnifying glass is what lens

Answer 33

Convex
Objects are very close to lens

Question 34

What is specular reflection?

Answer 34

When the surface is smooth, and it produces an image
Mirror

Question 35

What is the difefuse reflection?

Answer 35

Rough surfaces

Question 36

If light transmitted is different colour to object it will absorb it and produce

Answer 36

Black colour