Question

an object is placed at the following distances from a convex lens of focal length 10 cm:
a) 8cm b) 15cm c) 20cm d)25cm
which position of the object will produce:
a) A diminished real image ?
b) A magnified real image ?
c) A magnified virtual image ?
d) An image of the same size as the object
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Answer 1

Answer:

• 8cm.........

• B) part.......

Answer 2

An object is placed at the following distances from a concave mirror of focal length 10 cm : (a) 8 cm (b) 15 cm © 20 cm (d) 25 cm.

Which position of the object will produce :

(i) a diminished real image ?

(ii) a magnified real image ?

(iii) a magnified virtual image.

(iv) an image of the same size as the object ?