Question

) An object is placed 10 cm from a lens of focal length 5 cm. Draw the ray diagrams to show the formation
of image if the lens is (i) converging, and (ii) diverging​

Answer 1

Answer:

• The focal length = 5 cm
• Object distance = - 10 cm (Negative because object distance is always negative)

As we observe, the object distance is double of the focal length, we can conclude that the object is placed at the position of 2F.

CONVERGING LENS –

• The converging lens is also called convex lens.
• The ray diagram is in attachment.
• The nature of the image will be real and inverted.
• The size of the image formed will be same as of the object.
• The position of the image will be 2F2.

DIVERGING LENS –

• The diverging lens also called concave lens.
• The ray diagram is in attachment.
• The nature of the image will be virtual and erect.
• The size of the image is diminished.
• The position of the image is between the focus and optical centre.

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