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Q.

The sensitivity of eye varies with wavelength of light. The eye is most sensitive with ordinary intensity in which of the following lights?


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a

red light           

b

blue light           

c

yellow-green light           

d

red-green light 

answer is C.

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Detailed Solution

The sensitivity of the eye varies with the wavelength of light. For example, the eye is most sensitive to ordinary intensity in yellow-green light.
The reacting power of the human eye to light waves of different wavelengths varies from person to person and also varies with age. The normal human eye is most sensitive at a wavelength of 555 nm, which corresponds to the yellow-green light of the visible spectrum. Yellow-green light at this wavelength produces the impression of the highest brightness compared to light at other wavelengths.
 
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The sensitivity of eye varies with wavelength of light. The eye is most sensitive with ordinary intensity in which of the following lights?