Waves

Question 1

The distance from the crest of one wave to the crest of the next wave is called:

Answer 1

The wavelength

Question 2

What are the units of frequency?

Answer 2

Hz

Question 3

How do you calculate wave speed?

Answer 3

wave speed = frequency × wavelength

Question 4

How to light waves travel in relation to energy transfer?

Answer 4

They are perpendicular to the direction of energy transfer

Question 5

Some types of waves are longitudinal. This means that the oscillations:

Answer 5

Are in the same direction as the direction of travel and energy transfer

Question 6

What is shown in diagram B?

Answer 6

Refraction

Question 7

What is shown in diagram A?

Answer 7

Reflection

Question 8

What is shown in diagram D?

Answer 8

Diffraction

Question 9

What is the lowest frequency in the normal range of human hearing?

Answer 9

20Hz

Question 10

The faster an object vibrates:

Answer 10

The higher pitched the noise it makes.

Question 11

The bigger the vibrations when an object vibrates:

Answer 11

The louder the sound it makes.

Question 12

Which of the following types of electromagnetic radiation has the highest frequency?

Answer 12

Gamma radiation

Question 13

Which of the following types of electromagnetic radiation has the longest wavelength?

Answer 13

Microwaves

Question 14

Which type of electromagnetic radiation travels at the greatest speed in a vacuum?

Answer 14

They all travel at the same speed

Question 15

How do signals travel through optical fibres?

Answer 15

As infra-red radiation

Question 16

An advantage of wireless communications over wired communications is:

Answer 16

Wireless devices can be portable.

Question 17

Which type of electromagnetic radiation is used when mobile phones communicate with their base stations?

Answer 17

Microwaves are used when mobile phones communicate with their base stations.