MCQ
The electric field intensity at a point in vacuum is equal to:
- AZero
- BForce a proton would experience there.
- CForce an electron would experience there.
- ✓Force a unit positive charge would experience there.
The electric field intensity at a point in a vacuum is equal to force experienced by a unit positive charge placed at that point.
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$(i)$ Light can be totally internally reflected when it passes from $B$ to $A$
$(ii)$ Light can be totally internally reflected when it passes from $A$ to $B$
$(iii)$ Critical angle for total internal reflection is ${i_B} - {i_A}$
$(iv)$ Critical angle between $A$ and $B$ is ${\sin ^{ - 1}}\left( {\frac{{\sin {i_A}}}{{\sin {i_B}}}} \right)$
