A convex lens and a concave lens, each of focal length 10 cm , are kept separated by a distance of 2 cm as shown in the figure. If the light is incident from left, the combinations of lenses will be _____.

Converging or diverging depending on whether the lenses are arranged as shown in the figure or in the reverse order.

E M B I B E

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR SAT>Chapter 34 - Light>SAT 2020>Q 4

EASY

NTSE Stage II

IMPORTANT

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An object is placed at point A in front of a convex lens of focal length f. Its real, inverted, and magnified image is formed behind the lens. When the object is brought closer to the lens and placed at point B, virtual and erect images, but with the same magnification (in magnitude) as before are formed in front of the convex lens. Let F be the focus of the lens in front of it. Which of the following relations is correct?

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Important Questions on Light

EASY

NTSE Stage II

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR SAT>Chapter 34 - Light>SAT 2020>Q 5

Nethra, who is a back-bencher, discovers one day in the class that she is unable to discern the details on the blackboard very well. When she visits an optician, he prescribes glasses for her. Which of the following statement(s) is/are false?
I. She suffers from myopia where the far point is nearer than the blackboard.
II. A concave lens with a suitable power a help corrects her vision.
III. Her eye is defective and is forming images in front of the retina.
IV. A concave lens or a convex lens may be used to correct her vision.