I/GCSE Physics Question Analysis Topic: Physics - Short Questions
Exam Questions:
1) Which constituent radiation of the electromagnetic spectrum is used
(i) In RADAR,
(ii) To photograph internal parts of a human body, and
(iii) For taking photographs of the sky during night and foggy conditions?
Give one reason for your answer in each case.
2) Can the interference pattern be produced by two independent monochromatic source of light? Explain.
Answer:
For I/GCSE Physics, you should know:
1) (i) Radio waves, as it has a wavelength of 3 x 109 m.
(ii) X-rays, as it has a wavelength of 3 x 1016 - 3 x 1017 m.
(iii) Infrared radiation, as it has a wavelength of 3 x 1012 - 4 x 1011 m.
2) Interference can be produced only when two monochromatic sources of light are coherent.
According to the question, two independent monochromatic sources of light are used i.e., incoherent.
As such, an interference pattern cannot be produced.
Work hard for your I/GCSE Physics examination!
End of analysis. Great!
