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Form 4 Physics Electromagnetic Spectrum Topical Questions and Answers
State two use of microwaves
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1.
The table below shows the type of radiation, detection methods and uses of electromagnetic radiations. Complete the table.
2.
What measurable quantity is associated with colours of light?
3.
The table below carries information on the type of radiation, detector and use for some of the electromagnetic radiations. Fill in the blanks.
4.
Arrange the following in order of increasing frequencies –Gamma radiation, radio waves, infrared and X-rays.
5.
State two use of microwaves
6.
State the reasons why radio waves signals are easier to receive than TV (television) signals in a place surrounded by hills.
7.
The chart below shows an arrangement of different parts of the electromagnetic spectrum. Name the radiation represented by A
8.
Arrange the following in order of increasing frequency: Visible light, infra-red radiation, X-rays, u.v. radiation, radio waves.
9.
Name the difference between X-rays and Gamma rays in the way in which they are produced.
10.
The table below shows radiations and their respective frequencies. Arrange the radiations in the order of increasing energy..
11.
Explain the fact that radiant heat from the sun penetrates a glass sheet while radiant heat from burning wood is cut off by the glass sheet.
12.
The frequency of an electromagnetic wave is #4.0×10^6# Hz. Determine its wavelength (take speed of light as #3.0×10^8ms^-1#).
13.
State one characteristic of soft X-rays that distinguish them from hard X-rays.
14.
Arrange the following radiations in the order of increasing wavelengths; Purple light, gamma rays, infrared and ultraviolet.
15.
The figure below shows radiation from the sun passing through a glass in a greenhouse onto the floor. The floor then emits radiation. State the name of the radiation emitted by the floor.
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