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प्रश्न
State two uses of infrared radiations.
उत्तर
(i) For therapeutic purposes.
(ii) In night photography.
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संबंधित प्रश्न
Identify the part of the electromagnetic spectrum which is suitable for radar system used in aircraft navigation.
Name the phenomenon which shows the quantum nature of electromagnetic radiation.
State an additional use of the X-rays waves
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In a Coolidge tube, electrons strike the target and stop inside it. Does the target get more and more negatively charged as time passes?
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(Use Planck constant h = 6.63 × 10-34 Js= 4.14 × 10-15 eVs, speed of light c = 3 × 108 m/s.)
Answer briefly.
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