Science Answer In One word.

Angle of incidence: The angle formed between the incident ray PO and the normal ‘ON’ is angle of incidence.

Normal: The perpendicular line drawn from, the point of incidence to the plane of reflecting surface is called normal.

Reflected ray: The ray of light that comes from the point when the incident ray falls on the reflection material.

Incident ray- The ray of light that falls on the surface of the reflection materials.

When the disc turned quickly, the retina receives the sensation of the spectrum simultaneously and disc appears white.

When white light is made to fall on the surface of a prism, it disperses and we obtain a spectrum of light.

The phenomenon due to which left hand side of object appears as right hand side and vice versa is called lateral inversion.

The bouncing back of light from a reflecting surface of an object is called as reflection of light

A prism is an object made up of a transparent material, like glass or plastic that has at least two flat surfaces that form an acute angle (less than 90°).

A plane mirror is a mirror with a flat reflective surface. A plane mirror makes an image of objects in front of it.

parts of shadow

1. Umbra
2. Penumbra

No, the moon is non-luminous. The reason is that moon does not produce its own light. Instead, it reflects the light of the sun falling on it.

All objects which emit light energy by themselves are called luminous objects. Ex.: Sun, electric bulb.

Light is type of energy, that helps us to see all the things around us.

An eclipse is an incident, when any astronomical object is partially or fully obscured due to the placement of another astronomical object in the presence of light.

Newton Disc is a card board disc with seven equal sectors colored red, yellow, orange, green, blue, indigo and violet. When the disc turned quickly, the retina receives the sensation of the spectrum simultaneously and disc appears white.

The size of image formed by a plane mirror is same as that of the object infront of the mirror.

When light falls on smooth surface like mirror then it changes its direction, it is called reflection.

Prism.

Smooth and shiny surface reflects light.

Light travels along a straight line.

Sunlight is a mixture of seven colours.