Ray Optics Test...

Blue colour of sea water is due to

In the position of minimum deviation when a ray of yellow light passes through the prism, then its angle of incidence is

A circular disc of which 2/3 part is coated with yellow and 1/3 part is with blue. It is rotated about its central axis with high velocity, then it will be seen as

The fine powder of a coloured glass is seen as

When a white light passes through a hollow prism, then

Continuous emission spectrum is produced by

A prism of a certain angle deviates the red and blue rays by 8° and 12° respectively. Another prism of the same angle deviates the red and blue rays by 10° and14° respectively. The prisms are small angled and made of different materials. The dispersive powers of the materials of the prisms are in the ratio

If the refractive indices of a prism for red, yellow and violet colours be 1.61, 1.63 and 1.65 respectively, then the dispersive power of the prism will be

In fog, photographs of the objects taken with infrared radiations are more clear than those obtained duringvisible light because

Minimum deviation is observed with a prism having angle of prism A, angle of deviation δ, angle of incidence i and angle of emergence e. We then have generally