Fill in the blanks:

(a) An image that cannot be obtained on a screen is called ____________.

(b) Image formed by a convex __________ is always virtual and smaller in size.

(c) An image formed by a __________ mirror is always of the same size as that of the object.

(d) An image which can be obtained on a screen is called a _________ image.

(e) An image formed by a concave ___________ cannot be obtained on a screen.

Mark ‘T’ if the statement is true and ‘F’ if it is false:

(a) We can obtain an enlarged and erect image by a convex mirror. (T/F)

(b) A concave lens always forms a virtual image. (T/F)

(c) We can obtain a real, enlarged and inverted image by a concave mirror. (T/F)

(d) A real image cannot be obtained on a screen. (T/F)

(e) A concave mirror always forms a real image. (T/F)

Match the columns:

Column 1                                Column 2

(a) A plane mirror                 (i) used as a magnifying glass.

(b) A convex mirror            (ii) can form image of objects spread over a large area.

(c)A convex lens                  (iii) used by dentists to see enlarged image of teeth.

(d)A  Concave mirror          (iv) the image formed is always inverted and magnified.

(e) A Concave lens              (v) the image is erect and of the same size as the   object.

                                                     (vi) The image is erect and smaller.

State the characteristics of the image formed by a plane mirror.

Find out the letters of English alphabet or any other language known to you in which the image formed in a plane mirror appears exactly like the letter itself. Discuss your findings?

What is a virtual image? Give one situation where a virtual image is formed?

State two differences between convex and a concave lens.

Give one use each of a concave and a convex mirror.

Which type of mirror can form a real image?

Which type of lens forms always a virtual image?

A virtual image larger than the object can be produced by a

(i) concave lens         

(ii) concave mirror

(iii) convex mirror     

(iv) plane mirror

David is observing his image in a plane mirror. The distance between the mirror and his image is 4 m. If he moves 1 m towards the mirror, then the distance between David and his image will be

(i) 3 m                

(ii) 5 m

(iii) 6 m             

(iv) 8 m

The rear view mirror of a car is a plane mirror. A driver is reversing his car at a speed of 2 m/s. The driver sees in his rear view mirror the image of a truck parked behind his car. The speed at which the image of the truck appears to approach the driver will be

(i) 1 m/s                 

(ii) 2 m/s

(iii) 4 m/s              

(iv) 8 m/s