A convex lens produces an image of an object on a screen with a magnification of 1/2.When the lens is moved 30 cm away from the object, the magnification of the image is 2. The focal length is (1)20 cm (2) 25 cm (3)30cm (4) 35

Open in App

Solution

Suggest Corrections

Similar questions

A convex lens produces an image of an object on a screen with a magnification of $\frac{1}{2}$ .When the lens is moved 30 cm away from the object, the magnification of the image is 2.The focal length of the lens is

Q. A convex lens forms an image of an object on a screen

30 cm

from the lens. When the lens is moved

90 cm

towards the object, the image is again formed on the screen. Then the focal length of the lens is

Q. The magnification of an object placed in front of a convex lens of focal length

20 c m

+ 2

. The image distance is________.

Q. A object is placed at 30 cm on the principle axis of the convex lens from the lens and an image is formed 60 cm from the lens. If focal length of the lens is 20 cm then calculate the magnification.

Q. An object is placed at 30 cm in front of a convex lens of focal length 20 cm. Find the position of the image. What is the magnification of the object?
[4 MARKS]

Join BYJU'S Learning Program