Human Eye and C...

A ray of light travelling in air fall obliquely on the surface of a calm pond. It will-

How long does the light from an event stay in our eye?

In following, which mirror makes a diminished and virtual image of an object?

The far point of a healthy person is

The values of f and u for a concave lens are always

The inability among the elderly to see nearby objects clearly because of the weaking of the ciliary muscles is called-

The human eye forms the image of an object at its

What is the least distance for clear vision in old age?

The muscles of the iris control the

The angle through which a ray of light turns on passing through a prism is called-

When do we say a person is colour blind?

What Colour we obtain on mixing red, green and blue light?

Light waves are

At what rate the event should be projected to have the clear image?

The refractive indices of three media P, Q, R, are 1.73, 1.33 and 2.24 respectively. Arrange these media in increasing order of their optical density.