HELLYESBHARATH − Profile

iii class lever

When a vibrating body makes another bod to vibrate and if both have same and constant frequency then they are said to be as RESONANCE.

1. The ray of light must travel from denser to rarer

TOAL INTERNAL REFLECTION

NO

 refractive index of water = speed of light in vaccum *  refractive index.

       = 4/3 x 3 x 10 ^{8 ms-1}

       =  4 x 10 ^{8 ms-1}

 The infra red radiations can affect tthe photographic plates and they can pass through FOG therefore infra-red radiations can be preffered over ordinary visible for taking photograph in fog.

dai soundar

< i =< e angle of incidence = angle of emergent ray.

 M.A= AB \ FA

  M.A     = 60 / 40

  M.A= 1.5