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If Foucoult's method for determining the velocity of light in air, the distance between the concave mirror and the rotating mirror was 5 km. The speed of rotation of the rotating mirror was 300 rev//s. If the reflected ray is displaced through pi/60 radian, the velocity of light in air |
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Answer» `3 xx 10^(3)km//s` Velocity of LIGHT in air, `C=(4pinr)/300` `c =(4pi xx 300)/(pi/60) xx5xx10^(3)=4 xx 300 xx 60 xx 5 xx 10^(3)` `= 36 x 10^(7) m//s` |
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