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Question
Choose the correct option related to wavelengths (λ) of different parts of the electromagnetic spectrum.
Options
`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"`
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Solution
`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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