MCQ
Long distance short-wave radio broadcasting uses
- AGround wave
- BIonospheric wave
- ✓Direct wave
- DSky wave
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Reason : The repeated use of $NAND$ (or $NOR$) gates can produce all the basis or complicated gates.
$(i)$ 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 ${\sin ^{ - 1}}\left( {\frac{{\sin {i_A}}}{{\sin {i_B}}}} \right)$