Question

2. (a) It is desired to obtain an erect image of an
object, using a concave mirror of focal length 20 cm.
(i) What
should be the range of distance of the object
from the mirror?
(ii) Will the image be bigger or smaller than the
object?
(iii) Draw a ray diagram to show the image formation
in this case.
(b) One half a convex lens of focal length 20 cm is
covered with
black
paper.
(i) Will the lens produce a complete image of the
object?
(ii)Show the formation of image of an object placed at
2F1 of such covered lens with the help of a ray
diagram.
(iii) How will the intensity of the image formed by half-
covered lens compare with non-covered lens
a​

Answer 1

Answer:

mate give it one by one as brainly is accepting a answer more than 1000 words......

Answer 2

Explanation:

1) range should be between 0 to -20 cm

2) image will be bigger than object

draw diagram your self

b) yes the lens will give complete image but the image will be dull or less brighter

the intensity of light in covered lens will be less