# Section 2- Waves And The Electromagnetic Spectrum Flashcards Preview

## Physics GCSE Edexcel > Section 2- Waves And The Electromagnetic Spectrum > Flashcards

Flashcards in Section 2- Waves And The Electromagnetic Spectrum Deck (41)
1
Q

transverse wave

A
• perpendicular
• vibrations go up and down
• most waves are transverse

Eg. All electronic waves, S waves, ripples and waves in water

2
Q

longitudinal wave

A

•the vibrations are parallel to the direction the wave travels

Examples include sound waves and p waves

3
Q

equation for wave speed

A

-

4
Q

how to measure the speed of sound

A

-

5
Q

how to find speed of waves in solids

A

-

6
Q

refraction(waves)

A

Waves changing direction at a boundary

7
Q

definition of absorbed

A

If the wave is absorbed the wave transfers energy to the material’s energy stores

Often transferred to a thermal store which leads to heating (how microwaves work)

8
Q

definition of transmitted

A

If a wave is transmitted the waves carries on travelling through the material.

9
Q

definition of reflected

A

If a wave is reflected this means the ray is neither absorbed or transmitted but instead ‘sent back’

This is how echoes are created

10
Q

what causes sound waves?

A

Caused by vibrating objects

11
Q

what type of wave are sound sound waves?

A

Longitudinal waves

12
Q

how does sound travel in a gas?

A

-

13
Q

how does sound travel in a solid?

A

-

14
Q

how does sound travel in a liquid?

A

-

15
Q

what are echoes?

A

-

16
Q

explain how humans hear sound

A

-

17
Q

explain how ultrasound works

A

-

18
Q

what are ultrasounds used for?

A

-

19
Q

infrasound

A

Sound with frequencies lower than 20Hz

20
Q

definition of seismic waves

A
• earthquakes and explosions cause seismic waves
• can be detected with a seismometer
• two main types p waves and S waves
21
Q

p-waves

A
• longitudinal
• travel through solids and liquids
• travel faster than S waves
22
Q

s-waves

A
• transverse
• only travel through liquids
• slower than p waves
23
Q

reflection (light)

A

-

24
Q

definition of refraction

A

-

25
Q

what happens when the light refracts off a smooth surface?

A

-

26
Q

what happens when the light refracts off a rough surface?

A

-

27
Q

how to investigate fraction

A

-

28
Q

definition of converging/convex lens

A

-

29
Q

definition of diverging/concave lens

A

-

30
Q

how does light travel through a convex lens?

A

-

31
Q

how does light travel through a concave lens?

A

-

32
Q

how can you increase the power of the lenses?

A

-

33
Q

definition of virtual image

A

-

34
Q

definition of real image

A

-

35
Q

list the electromagnetic spectrum

A
• microwaves
• visible light
• ultra violet
• x-rays
• Gamma rays
36
Q

which has the longest wavelength in the electromagnetic spectrum?

A

37
Q

which has the lowest frequency in the electromagnetic spectrum?

A

38
Q

how can EM be used for communication ?

A

-

39
Q

uses and features of each in the EM spectrum

A

-

40
Q

which has the shortest wavelength in the electromagnetic spectrum?

A

Gamma rays

41
Q

which has the highest frequency in the electromagnetic spectrum?

A

Gamma rays