Light of wavelength 5000 x 10-8cm travels in free space with a velocity of 3 x 108ms-1. What is its wavelength in glass of refractive index 1.5?
Question 1 Report
Light of wavelength 5000 x 10-8cm travels in free space with a velocity of 3 x 108ms-1. What is its wavelength in glass of refractive index 1.5?
Answer Details
The speed of light in a vacuum is constant, but its speed decreases when it passes through a medium such as glass. The refractive index of a medium is a measure of how much the speed of light is reduced when it passes through that medium. The refractive index of glass is 1.5.
To find the wavelength of light in glass, we can use the formula:
wavelength in glass = wavelength in vacuum / refractive index of glass
In this case, the wavelength in vacuum is given as 5000 x 10^-8 cm, and the refractive index of glass is 1.5. Plugging these values into the formula, we get:
wavelength in glass = (5000 x 10^-8 cm) / 1.5
= 3333 x 10^-8 cm
Therefore, the answer is option A: 3333 x 10^-8 cm.
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