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Consider the electromagnetic radiations having wavelengths 200 nm, 500 nm and 1000 nm. Which wavelength (s) of the following can make visual sensation to a human eye?
  • a)
    200 nm and 500 nm
  • b)
    500 nm and 1000 nm
  • c)
    500 nm only
  • d)
    200 nm and 1000 nm
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
Consider the electromagnetic radiations having wavelengths 200 nm, 500...
Visible light - that which is detectable by the human eye - consists of wavelengths ranging from approximately 750 nanometres (7.50 x 10-7 m) down to 380 nanometres (3.80 x 10-7 m).
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Consider the electromagnetic radiations having wavelengths 200 nm, 500...
Visible Spectrum of Electromagnetic Radiation

The visible spectrum is the portion of the electromagnetic spectrum that can be seen by the human eye. It ranges from approximately 400 nm (violet) to 700 nm (red).

Explanation

The given wavelengths are 200 nm, 500 nm, and 1000 nm.

- The wavelength of 200 nm falls in the ultraviolet region of the electromagnetic spectrum and is not visible to the human eye.
- The wavelength of 500 nm falls in the green region of the visible spectrum and is visible to the human eye.
- The wavelength of 1000 nm falls in the infrared region of the electromagnetic spectrum and is not visible to the human eye.

Therefore, only the wavelength of 500 nm (option C) can make a visual sensation to the human eye.
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Consider the electromagnetic radiations having wavelengths 200 nm, 500 nm and 1000 nm. Which wavelength (s) of the following can make visual sensation to a human eye?a)200 nm and 500 nmb)500 nm and 1000 nmc)500 nm onlyd)200 nm and 1000 nmCorrect answer is option 'C'. Can you explain this answer?
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