A capacitor is constructed from two concentric spheres, the inner sphere of radius a being charged positively and the outer sphere of radius b as shown : Edit + + Let E1 = Electric field due to charges on inner sphere alone, = Electric field due to outer sphere alone, E2 = Electric field due to combination of all charges. E3 Then which of the following graphs is/are correct? (here r = distance from centre & radially outwards direction is considered positive) a b a a b Fig(i) Fig(ii) Fig(ii)

Q: a) ūx v = i x ũ b) ū·i = ở ·ũ

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Q: n1 = 1.33 θ1 = 37° θ2 = 24.91° Find n2 using Snell's Law.

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Applications Of Reflection Of Light

When a light ray (termed as the incident ray) hits a surface and bounces back (forms a reflected ray), the process of reflection of light has taken place.

Sign Convention for Mirrors

A mirror is made of glass that is coated with a metal amalgam on one side due to which the light ray incident on the surface undergoes reflection and not refraction.