Physics
A beam of light incident on a convex lens parallel to its principal axis converges at a point F on the principal axis. Name the point F. Draw a ray diagram to show it.
Refraction Lens
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Answer
The point at which a beam of light incident on a convex lens parallel to its principal axis converges is called the second focus. Below ray diagram shows the second focus of a convex lens:
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Related Questions
A ray of light, after refraction through a concave lens emerges parallel to the principal axis.
(a) Draw a ray diagram to show the incident ray and its corresponding emergent ray.
(b) The incident ray when produced meets the principal axis at a point F. Name the point F.
A parallel oblique beam of light falls on a
(i) convex lens,
(ii) concave lens.
Draw a diagram in each case to show the refraction of light through the lens.
A beam of light incident on a thin concave lens parallel to its principal axis diverges and appears to come from a point F on the principal axis. Name the point F. Draw a ray diagram to show it.
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(a) Draw a ray diagram to show it.
(b) The incident ray passes through a point F on the principal axis. Name the point F.