Differentiate between convex mirror and concave mirror.

Convex mirror Concave mirror 1) A convex mirror diverges the light rays 1) A concave mirror converges the light rays 2) The spherical mirror in which the reflection of light takes place at the bulging surface (convex surface) is called convex mirror. 2) The spherical mirror in which the reflection of light takes place at a bent surface (concave surface) is called concave mirror. 3) The focal length is negative in a convex mirror 3) The focal length is positive in a concave mirror 4) The convex mirror produces only virtual images 4) Concave mirror produces both real and virtual images

Distinguish between real image and virtual image.

Real image Virtual image 1) Real image can be obtained on a screen. 1) Virtual images cannot be obtained on a screen. 2) A real image is formed when light rays coming from an object actually meet at a point after reflection from a mirror or refraction through a lens. 2) A virtual image is formed when light rays coming from an object only appear to meet at a point when produced backward after reflection from a mirror or refraction through a lens. 3) Real images are inverted. 3) Virtual images are erect.

E M B I B E

Sciwise - A coursebook of Science>Chapter 20 - Light>EXERCISE>Q 6

MEDIUM

7th CBSE

IMPORTANT

Earn 100

State the position and the nature of the image formed by a convex lens when the object is placed beyond 2F.

Important Questions on Light

MEDIUM

7th CBSE

IMPORTANT

Sciwise - A coursebook of Science>Chapter 20 - Light>EXERCISE>Q 7

Describe Newton's disc.

MEDIUM

7th CBSE

IMPORTANT

Sciwise - A coursebook of Science>Chapter 20 - Light>EXERCISE>Q 1

What will be the difference in the size of the image (of the same object) formed by a small and a large plane mirror?

EASY

7th CBSE

IMPORTANT

Sciwise - A coursebook of Science>Chapter 20 - Light>EXERCISE>Q 2

State one way in which the image formed in a convex mirror is similar to that in a plane mirror and one way in which it is different.

HARD

7th CBSE

IMPORTANT

Sciwise - A coursebook of Science>Chapter 20 - Light>EXERCISE>Q 3

Why do we use reflectors that produce a parallel beam of light in vehicles by converging the rays? Why don't we use a reflector that diverge light rays so that a person can see a wider area?

MEDIUM

7th CBSE

IMPORTANT

Sciwise - A coursebook of Science>Chapter 20 - Light>EXERCISE>DISCUSS

Mirrors and lenses have made our life better. Do you agree? Answer in favour or against.

EASY

7th CBSE

IMPORTANT

Sciwise - A coursebook of Science>Chapter 20 - Light>EXERCISE>Q a

Draw a ray diagram to show image formation of an object placed at