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10th CBSE
IMPORTANT
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On which two factors does the focal length of a spherical lens depend?

Important Questions on Light - Reflection and Refraction

EASY
10th CBSE
IMPORTANT
Eduwiser's CBSE PHYSICS FOR CLASS X>Chapter 4 - Light - Reflection and Refraction>EXERCISE>Q 15
At what distance should an object be placed in front of a convex lens to form a real image of the same size as the object?
MEDIUM
10th CBSE
IMPORTANT
Eduwiser's CBSE PHYSICS FOR CLASS X>Chapter 4 - Light - Reflection and Refraction>EXERCISE>Q 16
In order to use a convex lens as a magnifying glass, where should the object be placed?
EASY
10th CBSE
IMPORTANT
Eduwiser's CBSE PHYSICS FOR CLASS X>Chapter 4 - Light - Reflection and Refraction>EXERCISE>Q 17
If we wish to obtain a real, inverted and magnified image of an object placed in front of a convex lens, where should the object be placed?
EASY
10th CBSE
IMPORTANT
Eduwiser's CBSE PHYSICS FOR CLASS X>Chapter 4 - Light - Reflection and Refraction>EXERCISE>Q 18
If an object is kept very far from a convex lens in front of it, where is its image formed? (at principal focus/at centre of curvature)
EASY
10th CBSE
IMPORTANT
Eduwiser's CBSE PHYSICS FOR CLASS X>Chapter 4 - Light - Reflection and Refraction>EXERCISE>Q 19
If an object is placed at a distance of 20 cm from a converging lens of focal length 20 cm, where is the image formed?
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10th CBSE
IMPORTANT
Eduwiser's CBSE PHYSICS FOR CLASS X>Chapter 4 - Light - Reflection and Refraction>EXERCISE>Q 20

Complete the path of light ray in the figure given.

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EASY
10th CBSE
IMPORTANT
Eduwiser's CBSE PHYSICS FOR CLASS X>Chapter 4 - Light - Reflection and Refraction>EXERCISE>Q 21
A 10 cm long object placed at a considerable distance from a concave lens, produces a virtual, erect and diminished image at a distance of 17 cm to the left of the lens. What is the focal length of the lens?
EASY
10th CBSE
IMPORTANT
Eduwiser's CBSE PHYSICS FOR CLASS X>Chapter 4 - Light - Reflection and Refraction>EXERCISE>Q 22
The focal length of a thin lens is -13 cm. State the type of lens.