Some Harder Electromagnetic Spectrum Questions:
The number of available marks is indicated at the end of each question.
What type of electromagnetic radiation radiates from warm objects?
Infrared
[1]
Describe surfaces that are good absorbers of radiation and those that are good reflectors of radiation.
Good absorbers = dark, matt surfaces
Good reflectors = light, shiny surfaces
[2]
A good absorber is also a good emitter – true or false?
True. Dark, matt surfaces are good at both emitting and absorbing radiation
[2]
A good emitter is also a good reflector – true or false?
False. Dark, matt surfaces are good emitters, but light shiny surfaces are good reflectors.
[2]
Which type of wave has the highest frequency in the Electromagnetic spectrum?
Gamma
[1]
Which type of wave has the lowest frequency in the Electromagnetic spectrum?
Radio waves
[1]
Which 2 Electromagnetic waves are adjacent (next to) Visible light in the Electromagnetic spectrum?
Ultraviolet and Infrared
[2]
Which 2 Electromagnetic waves lay between Visible light and Gamma waves in the Electromagnetic Spectrum?
Ultraviolet and X-rays
[2]
How fast do Electromagnetic waves travel?
300,000,000m/s
[1]
Which of the Electromagnetic waves is used in sun beds?
Ultraviolet
[1]
List 2 uses of Microwaves.
Cooking and Communication
[2]
How can Electromagnetic waves cause, detect and cure cancer?
· Energetic Electromagnetic waves may cause damage to cells, leading to cancer
· X-rays can be used to detect tumours
· Gamma waves and X-rays can be used to destroy cancerous tissue
[4]
Which of the Electromagnetic waves is used in optical fiber communication? Give other uses for these waves.
Infrared; can also be used in TV remote controls, heat lamps, thermal imaging and night vision.
[3]
What is meant by the frequency of a wave?
The number of waves passing a particular point in 1 second
[1]
Wavelength can be described as the distance from 1 wave crest to the next. Give a more general definition than this.
Wavelength is the distance from a particular point on the wave to the equivalent point on the next wave
[1]
If you measure the height of a wave from the trough to the crest, how does this relate to the amplitude?
Twice the amplitude
[1]
TOTAL MARKS: /27