Transfer energy without transferring matter

The law of reflection tells us that:

The angle of reflection is equal to the angle of incidence.

The angle of reflection depends on the surface.

The angle of reflection does not depend on the angle of incidence.

Glass has a higher refractive index than air. The speed of light is:

Slower in a glass block than in air.

The same speed in a glass block as in air.

Faster in a glass block than in air.

Which is the correct of of EM waves (from longest to shortest wavelength).

Radio, Microwave, Infra-red, Visible, Ultra-violet, X-ray, Gamma

Radio, Microwave, Infra-red, Visible, Gamma, X-ray, Ultra-violet

Gamma, X-ray, Ultra-violet, Visible, Infra-red, Microwave, Radio

Ultra-violet, X-ray, Gamma, Visible, Infra-red, Microwave, Radio

Which is the correct order for the colours of light (from longest to shortest wavelength)

Red, Orange, Yellow, Green, Blue, Indigo, Violet

Violet, Indigo, Blue, Green, Yellow, Orange, Red

Orange, Yellow, Red, Indigo, Blue, Violet, Green

Name a danger of microwaves

Internal heating of body tissue

Damage to surface cells and blindness

Name a danger of infra-red radiation

Internal heating of body tissue

Damage to surface cells and blindness

Name a danger of ultraviolet rays

Damage to surface cells and blindness

Internal heating of body tissue

Name a danger of gamma rays

Internal heating of body tissue

Damage to surface cells and blindness

What happens to light inside an optical fibre?

It is totally internally reflected

It is refracted out of the fibre

What is the critical angle?

The angle beyond which total internal reflection occurs.

The angle beyond which light refracts out of the object.

Which of the following is not a method for measuring the speed of sound:

Making two people stand apart and putting their hands up when they hear a sound

Knocking two blocks of wood together and measuring the time to hear the echo.

Making a sound with a loudspeaker and measuring the time for the sound to go past two microphones.

Waves

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40 questions

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the correct unit for an angle?

metres per second

hertz

metres

degrees

seconds

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the correct unit for wave speed?

metres per second

hertz

metres

degrees

seconds

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the correct unit for frequency?

metres per second

hertz

metres

degrees

seconds

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the correct unit for time period?

metres per second

hertz

metres

degrees

seconds

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the correct unit for wavelength?

metres per second

hertz

metres

degrees

seconds

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Longitudinal waves:

All travel at the same speed

Are caused by vibrations that are parallel to the direction of wave travel

Are caused by vibrations that are perpendicular to the direction of wave travel

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Transverse waves:

All travel at the same speed

Are caused by vibrations that are parallel to the direction of wave travel

Are caused by vibrations that are perpendicular to the direction of wave travel

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Waves

What is the correct unit for an angle?

What is the correct unit for wave speed?

What is the correct unit for frequency?

What is the correct unit for time period?

What is the correct unit for wavelength?

Longitudinal waves:

Transverse waves:

Waves:

Which is the correct equation for wave speed?

Which is the correct equation for the frequency of a wave?

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