MCQ
Broadcasting antennas are generally
- ✓vertical type
- Bboth vertical and horizontal type
- Comni directional type
- Dhorizontal type
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$(ii)$ The wavelength of $IR$ rays is less than that of $UV$-rays.
$(iii)$ The wavelength of microwaves is lesser than that of $IR$ rays.
$(iv)$ Gamma rays have shortest wavelength in the electromagnetic spectrum.
Of the above statements