Question

For total internal reflection to take place, the angle of inddence i and the refractive index µ of the medium must satisfy the inequality ____________.

Options

• `1/"sin i" < mu`

• `1/"sin i" > mu`

• `"sin i" < mu`

• `"sin i" > mu`

Answer 1

For total internal reflection to take place, the angle of inddence i and the refractive index µ of the medium must satisfy the inequality `1/"sin i" < mu`.

Explanation:

For total internal reflection i > i_C

sin i > sin i_C

`"sin i" > 1/mu`

`therefore 1/"sin i" < mu`