1.1. Figure 1 shows the parts of the electromagnetic spectrum.

Figure 1

i) Which row of the table names the parts J, K and L of the electromagnetic spectrum?

[1]

ii) All electromagnetic waves can travel in a vacuum.

Which of these is the same for all electromagnetic waves travelling in a vacuum?

[1]

1.2. X-rays can be useful and harmful to humans.

i) State one way that X-rays are useful to humans.

[1]

ii) State one way that X-rays are harmful to humans.

[1]

1.3. A person warms their hands in front of a hot fire as shown in Figure 2.

Figure 2

Use words from the box to complete the following sentences.

The electromagnetic waves that the fire mostly emits are .............................................................. waves.

These waves transfer .............................................................. energy to the hands.