Question

Critical angle of light passing from glass to air is maximum for ____________.

Options

• red

• green

• yellow

• violet

Answer 1

Critical angle of light passing from glass to air is maximum for red.

Explanation:

`""_"a"mu_"g" = 1/ "sin i"_"c"`

`"sin i"_"C" = 1/(""_"a"mu_"g")`

As µ for red colour is minimum, so sin i_C is maximum and hence critical angle i_C is maximum for red colour.