Physics
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.
Refraction Lens
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Answer
(a) Below diagram shows the incident ray and its corresponding emergent ray:
(b) The incident ray when produced meets the principal axis at a point F, which is called as the first focus .
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Show by a diagram the refraction of two light rays incident parallel to the principal axis on a concave lens by treating it as a combination of a glass slab and two triangular glass prisms.
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