CBSE Class 10 Answered
calculate the speed and wavelength of light (1) in glass and (2) in air,when light waves of frequency 6*10^14hz travel from air to glass of n=1.5?
Asked by PRAMOD | 28 Nov, 2013, 05:57: PM
Expert Answer
The speed of light in air is c = 3 × 108 m/s.
Thus, the speed of light in glass will be given as
v = c/n = 3 × 108/ 1.5 = 2 × 108 m/s.
The speed, wavelength and frequency are related as
c = νλ
Thus, wavelength in air is given as
λa = c/ν = 3 × 108/ 6 × 1014 = 5 × 10-7 m
Similarly, the wavelength in glass is given as
λg = v/ν = 2 × 108/ 6 × 1014 = 3.3 × 10-7 m
Answered by Romal Bhansali | 28 Nov, 2013, 07:35: PM
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