When light travelling in air passes into a sheet of glass,it is observed to change in wavelength to 58% of its wavelength in air.What is the speed of light in the glass? A) 5.2 $\times$ 10⁸ m/s B) 1.7 $\times$ 10⁸ m/s C) 3.0 $\times$ 10⁸ m/s D) 2.3 $\times$ 10⁸ m/s

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Quizplus · Accepted Answer

The speed of light in a medium is given by v = fλ, where f is the frequency and λ is the wavelength. Since frequency remains constant, the speed of light in glass is 58% of its speed in air (3.0 x 10^8 m/s), which is 1.74 x 10^8 m/s, approximately 1.7 x 10^8 m/s.

When Light Travelling in Air Passes into a Sheet of Glass,it