A) Green of wavelength 376 nm
B) Red of wavelength 665 nm
C) Green of wavelength 500 nm
D) Blue of wavelength 376 nm
Correct Answer: D
Solution :
When light travels from rarer to denser medium its wavelength reduces. Wavelength in water \[=\frac{{{\lambda }_{a}}}{{{\mu }_{w}}}\] \[=\frac{500}{(4/3)}=375\,nm\approx 376\,nm\](Blue colour)
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