MEDIUM
10th CBSE
IMPORTANT
Earn 100

A convex lens has a focal length of 30 cm. Calculate at what distance should the object be placed from the lens so that it forms an image at 60 cm on the other side of the lens. Find the magnification produced by the lens in this case.

Important Questions on Light - Reflection and Refraction

EASY
10th CBSE
IMPORTANT
Core Science Physics>Chapter 1 - Light - Reflection and Refraction>EXERCISE - 1D>Q 7
An object 50 cm tall is placed on the principal axis of a convex lens. Its 20 cm tall image is formed on the screen placed at a distance of 10 cm from the lens. Calculate the focal length of the lens.
MEDIUM
10th CBSE
IMPORTANT
Core Science Physics>Chapter 1 - Light - Reflection and Refraction>EXERCISE - 1D>Q 8
An object 3 cm high is placed at a distance of 20 cm in front of a convex lens of focal length 12 cm. Find the position, nature and size of the image formed.
EASY
10th CBSE
IMPORTANT
Core Science Physics>Chapter 1 - Light - Reflection and Refraction>EXERCISE - 1D>Q 9
Where should an object be placed from a converging lens of focal length 20 cm, so as to obtained a real image of magnification 2?
EASY
10th CBSE
IMPORTANT
Core Science Physics>Chapter 1 - Light - Reflection and Refraction>EXERCISE - 1D>Q 10
An object 3.0 cm high is placed perpendicular to the principal axis of a concave lens of focal length 15.0 cm. The image is formed at a distance of 10.0 cm from the lens. Calculate: distance at which the object is placed.
MEDIUM
10th CBSE
IMPORTANT
Core Science Physics>Chapter 1 - Light - Reflection and Refraction>EXERCISE - 1D>Q 10
An object 3.0 cm high is placed perpendicular to the principal axis of a concave lens of focal length 15.0 cm.
The image is formed at a distance of 10.0 cm from the lens. Calculate: size and nature of the image formed.
EASY
10th CBSE
IMPORTANT
Core Science Physics>Chapter 1 - Light - Reflection and Refraction>EXERCISE - 1D>Q 11
An object 20 cm tall is placed on the principal axis of a convex lens. Its 30 cm tall image is formed on the screen placed at a distance of 10 cm from the lens. Calculate the focal length of the lens.
EASY
10th CBSE
IMPORTANT
Core Science Physics>Chapter 1 - Light - Reflection and Refraction>EXERCISE - 1D>Q 12
An object 30 cm tall is placed on the principal axis of a convex lens. Its 10 cm tall inverted image is formed on the screen placed at a distance of 15 cm from the lens. Calculate the focal length of the lens.
HARD
10th CBSE
IMPORTANT
Core Science Physics>Chapter 1 - Light - Reflection and Refraction>EXERCISE - 1D>Q 14
A convex lens of focal length 20 cm produce a magnified virtual as well as real images. Is this a correct statement? If yes, where shall the object be placed in each case to obtain these images?