Question

17. Shadow is
a) an area where the light is absent
b) colourless
c) having variable size
d) all the above

18. The shape and size of a shadow for given object
a) changes with direction of incident light
b) changes with distance between light source of object
c) changes with distance between object and screen
d) all the above

19. The formation of inverted image on the screen of a pin hole camera explains that
a) light travles in a curved path
b) light travels in straight line
c) some time light can travel in straight line d) none of these

20. The imge formed by the following is inverted
a) magnifying glass b) pin hole camera c) glass slab
d) all the above​

Answer 1

Answer:

17)d

18)d

19)a

20)c

Explanation:

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Answer 2

Answer:

17.d

18.d

19.a

20.c

Explanation:

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