A convex lens forms an image on a screen. But when a glass slab (R.I. = 3/2) is placed in between them, then the screen has to be moved through a distance of 4 cm in order to form the image on the screen as usual. Calculate the thickness of the glass slab.
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1
Answer:
Explanation:Convex lens forms an image of an object on screen. The height of the image is 9 cm. The lens is now displaced until an image is again obtained on the screen. The height of this image is 4 cm. The distance between the object and the screen is 90 cm
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Answer:
ANSWER IS 12cm
Explanation:
we have formula for shift ie
shift = t(1 - 1/mew)
shift = 4
mew =3/2
put the values
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