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CBSE Class 10 Answered

LIGHT-REFLECTION AND REFRACTION(Please hurry!)
Asked by gunjansingh | 28 May, 2009, 07:30: AM
answered-by-expert Expert Answer

wavelength = 590 nm ; speed of light in air c = 3 x 108 m / s

since speed = frequency x wavlength

frequency = 3 x 108 / 590 x 10-9 = 3 x 1016 / 59  Hz

n = 3/2

n = c / v

v = c / n = 3 x 2 x108/ 3 = 2 x 108 m / s

since speed = frequency x wavlength

wavelength = speed / frequency = 2 x 108 x 59 / 3 x 1016 = (118 / 3) x 10-8 = (1180 / 3) nm

Answered by | 28 May, 2009, 09:28: AM

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