(a) Arrange the following radiations in the order of their increasing wavelength:
X-rays, infrared rays, ratio waves, gamma ray and micro waves?
(b) Which radiation is used for satellite communication?
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(a) Give a list of at least five radiations, in order of their increasing frequencies, which make up
(a) Five radiations, in the order of their increasing frequencies are: Infrared waves, Visible light, Ultraviolet, X-rays and Gamma rays. (b) Gamma rays have the highest penetrating power.
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State the approximate range of wavelength associated with (i) the ultraviolet rays, (ii) the visible light and (iii) infrared rays.
(i)Ultraviolet rays-wavelength range 100 Å to 4000 Å (ii)Visible light-wavelength range 4000 Å to 8000 Å (iii)Infrared radiations-wavelength range 8000 Å to 107 Å
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Give one use each of (i) microwaves, (ii) ultraviolet radiations, (iii) infrared radiations, and (iv) gamma rays.
(i)Microwaves are used for satellite communication. (ii)Ultraviolet radiations are used for detecting the purity of gems, eggs, ghee etc. (iii)Infrared radiations are used in remote control of television and other gadgets. (iv)Gamma rays...
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Name two sources, each of infrared radiations and ultraviolet radiations.
All heated bodies such as a heated iron ball, flame, fire etc., are the sources of infrared radiations. The electric arc and sparks give ultraviolet radiations.
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What are infrared radiations? How are they detected? State one use of these radiations.
Infrared radiations are the electromagnetic waves of wavelength in the range of 8000Å to 107Å. Detection: If a thermometer with a blackened bulb is moved from the violet end towards the...
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Mention three properties of infrared radiations similar to the visible light.
(a) Infrared radiations travel in straight line as light does, with a speed equal to 3 x 108m/s in vacuum. (b) They obey the laws of reflection and refraction. (c) They do...
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Give two such properties of infrared radiations which are not true for visible light.
(a) Infrared radiations are invisible. (b) They do not affect the ordinary photographic film.
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Explain the following: (i) Infrared radiations are used for photography in fog.
(i) Infrared radiations are used in photography in fog because they are not much scattered by the atmosphere, so they can penetrate appreciably through it. (ii) Infrared radiations are used as...
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Arrange the following electromagnetic waves in order of increasing frequency : y-rays/ microwaves, infrared rays and ultraviolet rays.
Microwaves < Infrared rays < Ultraviolet rays < y -rays.
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Arrange the following electromagnetic radiations in ascending order to their frequencies : (i) Microwaves (ii) Radio waves
Radio waves < Microwaves < X-rays < Gamma rays Uses of Microwaves (a) Aircraft, navigation (b) Uvens
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