JEE PHYSICS MCQ: MAGNETISM AND MATTER

1 Medium

1 of 1

Application +4 | -1

A light wave travelling linearly in a medium of dielectric constant 4, incidents on the horizontal interface separating medium with air. The angle of incidence for which the total intensity of incident wave will be reflected back into the same medium will be:
(Given : relative permeability of medium

{\mu _r} = 1)

View answer and explanation

Correct option: D

60^\circ

Option D (

60^\circ

) is correct because the angle of incidence must be greater than the critical angle for Total Internal Reflection (TIR) to occur, and the critical angle is 30 degrees.

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Curie temperature is the one above which A vibration magnetometer consists of two identical bar magnets placed one over the other such that they are perpendicular and bisect each other. The time period of oscillation in a horizontal magnetic field is

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\mu_{\mathrm{d}}, \mu_{\mathrm{p}}

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