Explain with the help of a diagram, why a pencil partly immersed in water appears to be bent at the water surface?

Important Questions on Light - Reflection and Refraction

MEDIUM

10th CBSE

IMPORTANT

Science Part-I NEW ERA PHYSICS Textbook for Class X>Chapter 4 - Light - Reflection and Refraction>HIGHER ORDER THINKING SKILLS (HOTS)>Q 6

A diverging lens of focal length

20 cm

forms an image of

12 cm

from the lens. Draw a scale diagram for the formation of image.

MEDIUM

10th CBSE

IMPORTANT

Science Part-I NEW ERA PHYSICS Textbook for Class X>Chapter 4 - Light - Reflection and Refraction>HIGHER ORDER THINKING SKILLS (HOTS)>Q 7

A concave lens of focal length

25 cm

and a convex lens of focal length

20 cm

are placed in contact with each other. What is the power of this combination? Also, calculate focal length of this combination.

MEDIUM

10th CBSE

IMPORTANT

Science Part-I NEW ERA PHYSICS Textbook for Class X>Chapter 4 - Light - Reflection and Refraction>HIGHER ORDER THINKING SKILLS (HOTS)>Q 8

The image of an object formed by a lens is of magnification $- 1$ . If the distance between the object and its image is $60 cm$ , what is the focal length of the lens? If the object is moved $20 cm$ towards the lens, where would the image be formed? State reason and also draw a ray diagram in support of your answer.

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