ConceptConceptDocsDocuments

CAIE IGCSE Physics Electromagnetic Spectrum Questions

Practise ordering electromagnetic regions, applying their common speed and wave equation and matching uses, hazards and communications to each region.

Syllabus
2026–2028
Course
Physics 0625

Exam points

  • order radio to gamma by increasing frequency and reverse the order for wavelength
  • use 3.0 × 10⁸ m/s for every electromagnetic wave in vacuum and apply v = fλ
  • match a region to a stated use, communication system or biological hazard

Covered syllabus points

3.3.1—Main regions of the EM spectrum in3.3.2—All EM waves travel at the same high3.3.3—EM spectrum uses: (a) radio waves3.3.4—Harm from excessive EM radiation: (a)3.3.5—Communication with artificial3.3.6—Speed of EM waves in a vacuum is 3.0 ×3.3.7—EM radiation: (a) mobile3.3.8—Difference between a digital and3.3.9—A sound can be transmitted as a3.3.10—Benefits of digital signalling

3.3 Electromagnetic spectrum question 1

[Maximum number: 2]

Question (a)

(a)

Visible light is an electromagnetic wave.

State the name of one region of the electromagnetic spectrum in which the waves have:

[ 2 ]

Question (i)

(i)

shorter wavelengths than visible light

[ 1 ]

Question (ii)

(ii)

longer wavelengths than visible light.

[ 1 ]

3.3 Electromagnetic spectrum question 2

[Maximum number: 1]

An eclipse of the Sun happens when the Moon comes between the Earth and the Sun.
Which statement is correct?

A

Infrared radiation from the Sun disappears before visible light and ultraviolet radiation.

B

Ultraviolet radiation from the Sun disappears before visible light and infrared radiation.

C

Visible light from the Sun disappears before ultraviolet radiation and infrared radiation.

D

Infrared radiation, ultraviolet radiation and visible light from the Sun all disappear at the same moment.

3.3 Electromagnetic spectrum question 3

[Maximum number: 3]

Question (a)

(a)

Electromagnetic waves have many uses.
On Fig. 5.1 draw one line from each use to the region of the electromagnetic (e-m) spectrum it uses.

Fig. 5.1

Fig. 5.1

[ 2 ]

Question (b)

(b)

State one advantage of using microwaves compared with radio waves to transmit mobile (cell) phone signals.

[ 1 ]
All question bank results loaded