Question

For which of the following position of a real object, a magnified virtual image is
produced by a convex lens of focal length 30 cm?​

Answer 1

Answer:

Here , f=15cm and 2f=30cm

(i) 20cm (Because a magnified real image is formed when the object is placed between f and 2f ).

(ii) 10cm ( Because a magnified virtual image is formed when the object is placed between f and the lens).

(iii) 35cm (Because a diminished real image is formed when the object is placed beyond 2f).

(iv) 30cm ( Because an image of same size as the object is formed when the object is placed at 2f).

Answer 2

For any distance which is less than focal length of that lens (ie. 30 cm), a magnified virtual image will be produced.

• The characteristics of the image produced by the convex lens is dependent upon various factors.
• One of the main factors is the position of the real object.
• Different positions of the real object with respect to the focal length of the lens, can create different types of images.
• In the case of convex lens, if we put any object at a less distance than the focal length of that lens, we we will get a magnified virtual image.