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प्रश्न
Choose the correct option related to wavelengths (λ) of different parts of the electromagnetic spectrum.
पर्याय
`λ_"x-rays" < λ_"micro waves" < λ_"radio waves" < λ_"visible"`
`λ_"visible" < λ_"X-rays" < λ_"radio waves" < λ_"micro waves"`
`λ_"radio waves" < λ_"micro waves" < λ_"visible" <λ_"X-rays"`
`λ_"visible" < λ_"micro waves" < λ_"radio waves" < λ_"X-rays"`
उत्तर
`λ_"radio waves" < λ_"micro waves" < λ_"visible" <λ_"X-rays"`
Explanation:
∵ E = `(hc)/lambda`
The orderly arrangement of different parts of EM wave in decreasing order of wavelength is as follows:
`λ_"radio waves" > λ_"microwaves" > λ_"IR" > λ_"visible" > λ_"UV" > λ_"X-rays" > λ_"gamma"`
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संबंधित प्रश्न
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).
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(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)].
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