Skip to content

Course home

The electromagnetic spectrum

The electromagnetic spectrum

EasyMediumHard
1234567891011121314
Question 13

An astronomical observatory monitors a star system and records four different electromagnetic emissions:

  • Signal P: radiation with a wavelength of 1.5 × 10-5 m
  • Signal Q: radiation with a photon energy of 3.0 × 10-19 J
  • Signal R: radiation with a frequency of 2.5 × 1012 Hz
  • Signal S: radiation with a wave period of 2.5 × 10-16 s

Which of these signals belongs to the visible region of the electromagnetic spectrum?

(Planck constant h=6.63×10−34 J sh = 6.63 \times 10^{-34}\text{ J s}h=6.63×10−34 J s, speed of electromagnetic waves in a vacuum c=3.00×108 m s−1c = 3.00 \times 10^{8}\text{ m s}^{-1}c=3.00×108 m s−1)

A

Signal P

B

Signal Q

C

Signal R

D

Signal S

Markscheme

The electromagnetic spectrum Questions

  1. IGCSE
  2. /Physics
  3. /The electromagnetic spectrum

28 exam-style questions on Edexcel IGCSE Physics The electromagnetic spectrum. Each one has a worked solution and a mark scheme showing where the marks go.

Question bank