A convex lens gives same height image wh...

A convex lens gives same height image when object is placed at 10cm and 30cm. What is focal lenth of lens

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The same size images are formed by a convex lens when the object is placed at 20cm or at 10cm from the lens. The focal length of convex lens is ____ cm

A screen is placed 90 cm away from a luminous object. The image of the object on the screen is formed by a convex lens at two different positions separated by 30 cm. what is the focal length of the lens?

Find the focal length of a convex lens which produces a real image at 60 cm from the lens when an object is placed at 40 cm in front of the lens.

The distance between the object and its real image from the convex lens is 60 cm and the height of image is two times the height of object . The focal length of the lens is

Draw a labelled ray diagram for the formation of image by a convex lens of focal length 15 cm when the object is placed at a distance of 25 cm from the lens. Determine the size of the image formed, if size of the object is 4 cm.

A concave lens is placed in contact with a convex lens of focal length 25 cm . The combination produces a real image at a distance of 80 cm , when an object is at a distance of 40 cm . What is the focal length of concave lens ?

A convex lens forms a real image on a screen placed at a distance 60 cm from the object. When the lens is shifted towards the screen by 20 cm , another image of the object is formed on the screen. The focal length of the lens is :

Describe the nature of image formed when an object is placed at a distance of 30 cm form a convex lens of focal length of 15 cm?

An object is kept at 20 cm in front of a convex lens and its real image is formed at 60 cm from the lens. Find (1) the focal length of the lens (2) the image if the height of the object is 6 cm.

JEE MAINS PREVIOUS YEAR-JEE MAIN 2021-PHYSICS SECTION B

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