Refraction by Plane Surfaces: Practice Problem & Solution
A ray of light travelling in air haves wavelength $\lambda$ , frequency n, velocity v and intensity, I. If this ray enters into water than these parameter are $\lambda'$ , n', v' and I' respectively. Which relation is correct: (2001)
Short Solution (Best for NEET):
To solve this problem, we apply the core principles of Refraction by Plane Surfaces. Understanding the underlying formula is key to arriving at the correct answer below:
When a light ray travels from one medium to another, its frequency remains absolutely unchanged because frequency is a fundamental characteristic of the source. Velocity and wavelength change based on the refractive index. Thus, $n = n'$ .
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