Question

2. Make two paper tubes of about 25 cm each, of which, one should slide in to the other. Place a

bigger convex lens (objective) on front side of the bigger tubes and small biconvex lens (eye piece)

on one side of the smaller tube. Insert the tubes in each other and your “telescope” is ready!

Adjust the tubes and you will be see objects enlarged, but inverted (up-side-down).

Q 2. What is the approximate focal length of Objective lens?

a. 25 to 28 cm

b. 32 to 35 cm

c. 36 to 38 cm

d. 15 to 17 cm​

Answer 1

Answer:

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