Question

please tell me the answer​

Answer 1

Answer:

I think torch light. this is the answer of 2nd question

Answer 2

Answer:

3) i) The rules used for drawing ray diagrams for the formation of an image by a concave mirror are:

Rule 1: If the incident ray is parallel to the principal axis then the reflected ray passes through the focus of the concave mirror.

Rule 2: If the incident ray passes through the focus of the concave mirror, the reflected ray is parallel to the principle axis.

Rule 3: If the incident ray passes through the centre of curvature of the concave mirror, the reflected ray traces the same path.

Explanation:

3 ii)

In torches, the source of light is placed at the focus of the concave mirror to obtain a parallel beam of light.

In projector lamps, the source of light is placed at the centre of curvature of the concave mirror.

In floodlights, the source of light is placed just beyond the centre of curvature of the concave mirror