# Name the radiation of the electromagnetic spectrum which is used for the following :(a) Radar(b) To photograph internal parts of the human body(c) For taking photographs of the sky during night and foggy conditionsGive the frequency range in each case.

The radiation of the electromagnetic spectrum,m which is used for:-

(a) Radar is ;

$\Rightarrow$ Microwaves with the frequency range $10^{10}Hz \ to\ 10^{12}Hz$

(b) To photograph internal parts of the human body is ;

$\Rightarrow$X-rays  with the frequency range $10^{16}Hz- 10^{20}Hz$

(c) For taking photographs of the sky during the night and foggy conditions is -

infrared radiations with a frequency range $10^{12}Hz- 10^{14}Hz$

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