Properties of Mirrors and Light

The video explains the concepts of real and virtual images using concave and convex mirrors. It demonstrates how a concave mirror can focus sunlight to create a real image, while a convex mirror causes light rays to diverge, forming a virtual image. The video also compares these concepts with plain mirrors and discusses practical applications in car headlights and rear view mirrors.

What happens to the paper when it is placed at the focus of a concave mirror under sunlight?

• It starts to burn.

• It turns transparent.

• It becomes wet.

• It remains unchanged.

What is a characteristic of a real image formed by a concave mirror?

• It cannot be projected on a screen.

• It is always smaller than the object.

• It can be captured on a screen.

• It is always larger than the object.

Why do convex mirrors form virtual images?

• Because they converge light rays.

• Because they reflect light rays parallel to the principal axis.

• Because they diverge light rays.

• Because they absorb light rays.

What type of image is formed by a plain mirror?

• Virtual image

• Real image

• Inverted image

• Magnified image

In a car headlight, where is the bulb placed relative to the concave mirror?

• At the focus

• At the edge

• At the center of curvature

• At the vertex

What is the purpose of the parallel rays produced by a car headlight?

• To create a spotlight effect

• To illuminate the interior of the car

• To allow the driver to see far ahead

• To create a decorative pattern

Why are convex mirrors used in car rearview mirrors?

• To provide a magnified view

• To offer a wider field of view

• To focus light on the driver

• To reduce glare from headlights

What is a disadvantage of using a plain mirror instead of a convex mirror in rearview mirrors?

• It offers a narrower field of view.

• It is more expensive.

• It provides a distorted image.

• It reflects less light.

What happens to light rays after they reflect off a convex mirror?

• They diverge outward.

• They are absorbed by the mirror.

• They travel parallel to each other.

• They converge at a point.

Which type of image cannot be projected onto a screen?

• Magnified image

• Virtual image

• Inverted image

• Real image