Question

If a light ray comes in to a convex lens parallel to the principal axis, it will be refracted through the ___ point.
A locus
B focal
How many rays are needed to be drawn to determine the location of the image?
A two
B three
C four
True or False: An image created by an object located inside the focal point is virtual, enlarged, and upright.
A True
B False
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Answer 1

1) B — focal.
Ray parallel to the principal axis of a convex lens refracts through the focal point.

2) A — two.
Two principal rays (e.g., parallel→focal and through center) suffice to locate the image.

3) A — True.
An object inside the focal length of a convex (converging) lens produces a virtual, upright, enlarged image.