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प्रश्न
Arrange the following electromagnetic radiation in the ascending order of their frequencies:
X-rays, microwaves, gamma rays, radio waves
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उत्तर
Arranging in ascending order of frequency:
Radio waves, Microwaves, X-rays, Gamma rays
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संबंधित प्रश्न
How are infrared waves produced?
Identify the part of the electromagnetic spectrum which is suitable for radar system used in aircraft navigation.
Given below are some famous numbers associated with electromagnetic radiations in different contexts in physics. State the part of the electromagnetic spectrum to which each belongs.
(a) 21 cm (wavelength emitted by atomic hydrogen in interstellar space).
(b) 1057 MHz (frequency of radiation arising from two close energy levels in hydrogen; known as Lamb shift).
(c) 2.7 K [temperature associated with the isotropic radiation filling all space-thought to be a relic of the ‘big-bang’ origin of the universe].
(d) 5890 Å - 5896 Å [double lines of sodium]
(e) 14.4 keV [energy of a particular transition in 57Fe nucleus associated with a famous high resolution spectroscopic method (Mössbauer spectroscopy)].
Name three properties of ultraviolet radiations which are similar to visible light.
When a Coolidge tube is operated for some time it becomes hot. Where does the heat come from?
State two uses of infrared radiations.
Choose the correct option.
How does the frequency of a beam of ultraviolet light change when it travels from air into glass?
Name the e.m. waves which are suitable for radar systems used in aircraft navigation. Write the range of frequency of these waves.
SONAR emits which of the following waves?
What is the speed of radio waves in vacuum?
