IGCSE Electromagnetic Spectrum Introduction

Name the distance between adjacent peaks of a wave ( symbol λ)

• Amplitude

• Frequency

• Length

• Wavelength

The number of wave cycles to pass a given point per time unit

• Half life

• Time period

• Frequency

• Amplitude

The wavelength and frequency of a wave are related in that...

• they are always the same

• when one increases, the other decreases (inversely proportional)

• no correlation

• they are both confusing

What is the speed of light in a vacuum in km/s?

• 3,000

• 300

• 300,000

• 300, 000, 000

Which electromagnetic waves have the SHORTEST wavelength and, therefore, the highest frequency and the most energy

• Radio

• Ultraviolet

• Gamma

• X-rays

Which electromagnetic waves have the longest wavelength and the lowest frequency

• Radio

• Visible

• Gamma

• Microwaves

Which electromagnetic waves can the human eye detect?

• X-rays

• Radio

• Visible

• Gamma

Which colour has the smallest wavelength?

• red

• orange

• green

• blue

Are electromagnetic waves transverse or longitudinal?

• Transverse

• Longitudinal

Select two properties common to all electromagnetic waves

• Same speed in a vacuum

• Longitudinal waves

• Transverse wavs

• Amplitude

• Same speed