Science Give the definition [1 M]

Scattering back of the light, when falls on shining and smooth surfaces, is called reflection.

Rods are the nerve cells on retina, which are sensitive to dim light.

Reflection from a smooth surface like that of a mirror is called regular reflection.

The incident ray, the normal and the reflected ray all lie on the same plane at the point of incidence. The angle of reflection is always equal to the angle of incidence. (∠i = ∠r).

Phenomenon of changing side left to right and right to left by the mirror while forming images is called Lateral inversion.

There is an interesting device based on the principle of multiple reflections in inclined mirrors. It is called Kaleidoscope.

The light reflected from non-polished surfaces is also scattered back. But the light reflected from them is not in a well-defined direction. It spreads out in all directions. This is called Diffused reflection.

It is the transparent front part of the eye.

Cones are nerve cells on retina, which are sensitive to bright light and sense colour.

It is the most popular resource for reading and writing of visually challenged persons developed by Louis Braille.

At the junction of the optic nerve and the retina, there are no sensory cells, so no vision is possible on that spot. This is called the blind spot.

The angle between the normal and the reflected ray is called the angle of reflection.

The angle between the normal and the incident ray is called the angle of incidence.