MCQ
A particle revolves round a circular path. The acceleration of the particle is
- AAlong the circumference of the circle
- BAlong the tangent
- ✓Along the radius
- DZero
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Statement $-1:$ Short wave transmission is achieved due to the total internal reflection of the $e-m$ wave from an appropriate height in the ionosphere.
Statement $-2:$ Refractive index of a ionosphere is independent of the frequency of $e-m$ waves