Category Archive: OPTICS

Sep 06

Why Rainbow is in the form of an arc?

Why is a rainbow always bent in the shape of a semi circle…?? but according to the theory light travels straight….!!! (Ramesh asked)

Permanent link to this article: http://www.plustwophysics.com/why-rainbow-is-in-the-form-of-an-arc/

Jun 28

Why the ray of light passing through the centre of curvature of a concave mirror behave as normal while it doesn’t behave as normal when it passes through other points on the principal axis?

Remember that a concave mirror forms part of a hollow sphere.

Any line joining the centre of the sphere (the centre of curvature of the mirror) and any point

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Permanent link to this article: http://www.plustwophysics.com/why-the-ray-of-light-passing-through-the-centre-of-curvature-of-a-concave-mirror-behave-as-normal-while-it-doesnt-behave-as-normal-when-it-passes-through-other-points-on-the-principal-axis/

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