JEE PHYSICS MCQ: RAY OPTICS

1 Medium

1 of 1

Application +4 | -1

For a colour of light the wavelength for air is

6000\;\,\mathop \mathrm{A}\limits^ \circ

and in water the wavelength is

4500\;\,\mathop \mathrm{A}\limits^ \circ

. Then the speed of light in water will be

View answer and explanation

Correct option: B

2.25\,\, \times \,\,{10^8}\,\,m/s

Option B (

2.25 \times {10^8}\\ m/s

) is correct because the speed of light in a medium is proportional to the wavelength in that medium. The speed is reduced proportionally to the wavelength reduction.

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