Question

1) What is a ray of light?
2) What do you mean by rectilinear propagation of light?
Describe an activity to show that light travels in a straight line.
3) What is a shadow? How is it formed?​

Answer 1

1. In optics a ray is an idealized model of light, obtained by choosing a line that is perpendicular to the wavefronts of the actual light, and that points in the direction of energy flow.

2. Rectilinear propagation describes the tendency of Electromagnetic waves (light) to travel in a staight line. Light only deviates from a straight line when the medium it is travelling through changes density. ... A light is set up behind the cardboard. The light appears through all three holes from the other side.

Activitiy - Two experiments are used to demonstrate how light travels in straight lines. In the first example, the presenter arranges three pieces of card, with holes in, in an uneven line. The light stops and cannot travel through all three cards. When she arranges the holes in a straight line, the light can travel through.

3. A shadow is actually just a space or region, where there is no light since an opaque object is blocking light rays. The position and intensity of the source of light affect the properties of the type of shadow that is formed. For example, let us consider the sun to be a light source.

Please mark as the Brainliest Answer and give thanks.

Answer 2

Explanation:

1. In optics a ray is an idealized model of light, obtained by choosing a line that is perpendicular to the wavefronts of the actual light, and that points in the direction of energy flow.
2. Rectilinear propagation describes the tendency of Electromagnetic waves (light) to travel in a staight line. Light only deviates from a straight line when the medium it is travelling through changes density. This is called refraction. The light appears through all three holes from the other side.
3. shadow is a dark area or shape produced by a body coming between rays of light and a surface.The position and intensity of the source of light affect the properties of the type of shadow that is formed. For example, let us consider the sun to be a light source.

please make me brainlist