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Q: When the object is placed at ………, no image will form in the converging lens?
  • A. Focus point
  • B. Twice the focal length
  • C. More than twice the focal length
  • D. Before the focus point
Correct Answer: Option A - A fixed point on the principal axis of the lens, through which the rays going through or coming out of it become refracted from the lens and become parallel to the principal axis. This point is called 'focus point', and the distance of this point from the lens is called 'focal length'. An object placed at the focus point will not create any image in the converging lens.
A. A fixed point on the principal axis of the lens, through which the rays going through or coming out of it become refracted from the lens and become parallel to the principal axis. This point is called 'focus point', and the distance of this point from the lens is called 'focal length'. An object placed at the focus point will not create any image in the converging lens.

Explanations:

A fixed point on the principal axis of the lens, through which the rays going through or coming out of it become refracted from the lens and become parallel to the principal axis. This point is called 'focus point', and the distance of this point from the lens is called 'focal length'. An object placed at the focus point will not create any image in the converging lens.