Pearson Edexcel GCSE (9-1) · Physics (1PH0)

Electromagnetic spectrum: uses and dangers: Practice Questions

5 multiple-choice questions marked as you go, and 2 written questions with worked solutions. All on Electromagnetic spectrum: uses and dangers.

7 questions16 marksFree, no account

Question 1

1 mark

Which part of the electromagnetic spectrum is used for both satellite transmissions and cooking food?

Question 2

1 mark

When light travels from air into a rectangular glass block at an angle to the normal, which of the following describes its change in speed and direction?

Question 3

1 mark

A ray of light is incident on the boundary between glass and air. The critical angle for glass is \(42^{\circ}\). If the angle of incidence is increased from \(40^{\circ}\) to \(45^{\circ}\), what happens to the ray?

Question 4

1 mark

The power of a lens is given as \(+5.0\text{ D}\). Calculate the focal length of this lens and identify its type.

Question 5

1 mark

The Earth’s temperature depends on the balance between the rate of energy received from the Sun and the rate of energy radiated back into space. If the Earth's atmosphere becomes more effective at absorbing infrared radiation emitted from the surface without changing the rate of incoming solar radiation, what happens to the Earth's temperature and the power it radiates?

Question 6

4 marks

An object is placed in front of a converging lens. The lens has a power of \(+5.0\) dioptres.

(a) Calculate the focal length of this lens in centimeters.
(b) Describe the difference between a real image and a virtual image produced by a lens.
(c) State one use of ultraviolet radiation and one associated danger of overexposure to it.

Write your answer out first, then check it against the worked solution.

Question 7

7 marks

Visible light and X-rays are both parts of the electromagnetic spectrum. A specific source emits visible light with a wavelength of \(5.0 \times 10^{-7}\) m.

(a) All electromagnetic waves travel at the same speed in a vacuum. State this speed and calculate the frequency of this visible light. (\(v = f \times \lambda\)).
(b) X-rays have a much higher frequency than visible light. Explain, in terms of atoms and energy, how X-rays can be produced and why they pose a greater risk to human health than visible light.
(c) A beam of light travels from air into a glass block. Describe what happens to the speed, wavelength, and direction of the light as it enters the glass at an angle.

Write your answer out first, then check it against the worked solution.

* The content provided by thinka is generated by AI and may not always be accurate or up-to-date. Please use it as a supplementary resource and verify with official materials.

You've seen the model answer. Now get yours marked.

This page can show you how a good answer looks. It cannot tell you what your answer was missing. thinka marks your written work against the real mark scheme in about 15 seconds.

Get My Answers Marked Back to the notes

Want more questions like these? Get a fresh set on this topic, graded as you go.

Practice More