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Magnification produced by a rear view mirror fitted in vehicles [NCERT Exemplar Problems

Question

(a) is less than one (b) is more than one (c) is equal to one (d) can be more than or less than one depending upon the position of the object in front of it

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Class 10 science 3 years 1 Answer 5 views Enlightened 0

A beam of light is incident through the holes on side A and emerges out of the hole on the other face of the box as shown in the figure. Which of the following could be inside the box? [NCERT Exemplar Problems

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a) Concave lens (b) Rectangular glass slab (c) Prism (d) Convex lens

Class 10 science 3 years 0 Answers 6 views Enlightened 0

A magnified real image is formed by a convex lens when the object is at

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(a) F (b) between F and 2F (c) 2F (d) only (a) and (b) both

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Class 10 science 3 years 1 Answer 5 views Enlightened 0

when object moves closer to convex lens, the image formed by it shift

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(a) away from the lens (b) towards the lens (c) first towards and then away from the lens (d) first away and then towards the lens

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Class 10 science 3 years 1 Answer 11 views Enlightened 0

A divergent lens will produce

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(a) always real image (b) always virtual image (c) both real and virtual image (d) none of these

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Class 10 science 3 years 1 Answer 18 views Enlightened 0

change in focal length of an eye lens is caused by the action of the

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(a) pupil (b) retina (c) ciliary muscles (d) iris

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Class 10 science 3 years 1 Answer 12 views Enlightened 0

The least distance of distinct vision for a young adult with normal vision is about

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(a) 25 m (b) 2.5 cm (c) 25 cm (d) 2.5 m

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Class 10 science 3 years 1 Answer 20 views Enlightened 0

Which of the following is a natural phenomenon which is caused by the dispersion of sunlight in the sky?

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(a) Twinkling of stars (b) Stars seem higher than they actually are (c) Advanced sunrise and delayed sunset (d) Rainbow

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Class 10 science 3 years 1 Answer 15 views Enlightened 0

.The persistence of vision for human eye is

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a. 1/10th of a second b. 1/16th of a second c. 1/6th of the second d. 1/18th of a second

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Class 10 science 3 years 2 Answers 33 views Enlightened 0

The coloured light that reflects most while passing through a prism is :

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A. yellow B. Violet C. Blue D. Red

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Class 10 science 3 years 1 Answer 20 views Enlightened 0

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