Light

Light emitted by a torch light and light emitted from the headlights of a vehicle.

Reflection of light.

Due to the reflection of light, the impression of an object formed in a mirror is called the image of the object.

True

True.

Virtual images.

Left side

So that when the driver of a vehicle in front looks into his rear - view mirror, can read ambulance written on it quickly and give way to it.

All of the above.

Principle of reflection

Spherical mirror

Concave mirror and convex mirror.

Concave mirrors are used by dentists to obtain a magnified image of the teeth. They are also used in solar heaters or solar concentrators, and as reflectors in flashlights, and headlights of cars and scooters.

Convex mirror are used as reflectors at sharp turns and tricky or ‘blind’ corners and in parking lots, and as rear-view mirrors in cars and on motorcycles.

The image formed by a plane mirror cannot be captured on a screen, and is called a virtual image.

Images that can be captured on a screen are known as real images.

In a camera, images are real and can be captured on the negative, which acts as a screen.

True

When light rays are incident on a concave lens, they bend outwards or diverge.

Diverging lens

Upright, virtual and smaller than the object.

Peep holes contain concave lenses.

Converging lens

Virtual, erect and magnified.

Lenses are used in magnifying glasses, peep holes, cameras, bioscopes, binoculars, telescopes, microscopes and projectors.

Both a and c.

A rainbow is formed by the refraction and reflection of the sun’s rays through raindrops.

When it is raining in one part of the sky and sunny in another, a rainbow appears.

Seven

False.

Plane

False

A concave lens always forms a virtual, erect and smaller image than the object.

Infinite

Radius of curvature = 2 X focal length.
R = 2f.

The focus of convex mirror is situated behind it.