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प्रश्न
Name the radiation of the electromagnetic spectrum which is used for the following:
Radar and Give the frequency range.
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उत्तर
Microwave (109 − 1012)Hz
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संबंधित प्रश्न
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When a Coolidge tube is operated for some time it becomes hot. Where does the heat come from?
X-ray from a Coolidge tube is incident on a thin aluminium foil. The intensity of the X-ray transmitted by the foil is found to be I0. The heating current is increased to increase the temperature of the filament. The intensity of the X-ray transmitted by the foil will be
(a) zero
(b) < I0
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| Gamma rays | D | C | Visible light | B | A |
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(a) Identify the parts of the spectrum marked as A, B, C and D.
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(f) Name one use of each of the radiation.
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(a) 250 nm
(b) 1500 nm
Answer briefly.
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