Question

Read the following and answer any four questions from 07 (1) to 07 (1)
sub part of the question carries I mark)
07. If we allow sunlight to fall on a convex lens, hold a paper screen on the opposite side and move the paper screen
gradually away from the lens, till a sharp bright spot is formed on the screen.
07-1). The spot is due to:
(a)reflection of sunlight (b) refraction of sunlight (c) scattering of sunlight (d) none of these
07-(ii).The sharp, bright spot on paper represents the image of:
(a) the sun (b) the atmosphere (c) any distant object (d) none of these
07-(ii).What is focal length of convex lens?
(a) distance of paper screen from the sun (b) distance of lens from the sun
(c) distance of paper screen from the lens (d) height of paper screen.
07-(iv).Can the samne activity be performed using a concave lens?
(a) yes
(b) no, never (c) yes, sometimes
(d) none of these
074v).What happens when we use a thinner convex lens?
(a) the paper screen has to be moved away from the lens
(b) the paper screen has to be moved closer to the leas
(c)the paper screen has to be moved sideways (d) the paper screen has to be moved upwards.
answer please urgently​

Answer 1

Answer:

( i) (b)refraction of sunlight

(ii) (a) the sun

(iii) (c)distance of paper screen from the lens

(iv) (b)no, never

(v) (a)the paper screen has to be moved away from the lens

Answer 2

Answer:

ddjejeihdvdvjneveevr

Explanation:

ndbdnf