MEDIUM
10th CBSE
IMPORTANT
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Solar cookers contain a concave mirror. How does the concave mirror help in heating the food?

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Important Questions on Light - Reflection and Refraction

EASY
10th CBSE
IMPORTANT
Science Textbook of Competency Based Questions for Class X>Chapter 10 - Metals and Non-metals>Exercise>Q 73

The picture shows the path of light as it travels from one medium to another.

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What is medium 1 and medium 2?

EASY
10th CBSE
IMPORTANT
Science Textbook of Competency Based Questions for Class X>Chapter 10 - Metals and Non-metals>Exercise>Q 74
The power of a lens (P) is calculated by the formula: P= 1f, where f is the focal length of the lens. A lens has a focal length of – 0.25 m. Is it a convex lens or a concave lens? Explain your answer.
MEDIUM
10th CBSE
IMPORTANT
Science Textbook of Competency Based Questions for Class X>Chapter 10 - Metals and Non-metals>Exercise>Q 76
When an incident ray of light enters a medium from the air, it bends towards the normal. Which of the following is TRUE about the refractive index of the medium (nm) as compared to the refractive index of air (na)?
MEDIUM
10th CBSE
IMPORTANT
Science Textbook of Competency Based Questions for Class X>Chapter 10 - Metals and Non-metals>Exercise>Q 87

A lens made of material with a refractive index 1.5 is immersed in a liquid with a refractive index 1.5. The diagram below shows two rays incident on the lens when it is immersed in the liquid.

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Copy the diagram and draw the light rays after they pass through the lens. Justify your diagram.

HARD
10th CBSE
IMPORTANT
Science Textbook of Competency Based Questions for Class X>Chapter 10 - Light - Reflection and Refraction>Exercise>Q 24
Two big mirrors A and B are fitted side by side on a wall. A man is standing at such a distance from the wall that he can see the erect image of his face in both the mirrors. When the man starts walking towards the mirrors, he finds that the size of his face in mirror A goes on increasing but that in mirror B remains the same.
HARD
10th CBSE
IMPORTANT
Science Textbook of Competency Based Questions for Class X>Chapter 10 - Light - Reflection and Refraction>Exercise>Q 25
An object is placed at a certain distance on the principal axis of a concave mirror. The image is formed at a distance of 30 cm from the mirror. Find the object distance if the radius of curvature R=15 cm.
HARD
10th CBSE
IMPORTANT
Science Textbook of Competency Based Questions for Class X>Chapter 10 - Light - Reflection and Refraction>Exercise>Q 26
Size of a real image of an object formed by a mirror having a focal length of 20 cm is observed to be reduced to 13rd of its size. At what distance the object has been placed in front of the mirror?
HARD
10th CBSE
IMPORTANT
Science Textbook of Competency Based Questions for Class X>Chapter 10 - Carbon and its Compounds>Exercise>Q 7

A spherical lens forms three times magnified real image of an object placed in front of the lens. If the object is moved towards the lens through 8 cm, five times magnified virtual image is obtained. Then