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1) An object with a height of 4.0 cm is at a position of 6.0 cm in front of a co

ID: 306459 • Letter: 1

Question

1) An object with a height of 4.0 cm is at a position of 6.0 cm in front of a converging lens. The image inverts and is at a position 3.0 cm from the lens. The image height is

2) You place an arrow in front of a converging mirror at some position do > 2f. You observe the position of the image and place a piece of paper at the image position. What will you observe on the paper?

3) An object is at a position of 6.0 cm from a converging lens with a focal length of 3.0 cm. The resulting image is

a. 2.0 cm. b. 8.0 cm. c. 12.0 cm. d. 3.0 cm.

Explanation / Answer

1) s = 6 cm

s' = 3 cm

and hi / ho = - s' / s

h / 4 = - 3 / 6

hi = 2 cm Ans(a)


2) do > 2 f

then f < di < 2f

m = -ve and |m| < 1


Ans: (b)

3) s = 6 cm

f = 3 cm

1/f = 1/s + 1/s'

s' = 6 cm

m = - s' / s = - 1

s' > 0 => real

m < 0 => inverted

Ans: (A)