MCQ
A signal of $100 \,THz$ frequency can be transmitted with maximum efficiency by
- ACoaxial cable
- ✓Optical fibre
- CTwisted pair of copper wires
- DWater
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| લિસ્ટ$-I$ | લિસ્ટ$-II$ |
| $a$. Infrared waves | $i$. To treat muscular strain |
| $b$. Radio waves | $ii$. For broadcasting |
| $c$. $X-$rays | $iii$. To detect fracture of bones |
| $d$. Ultraviolet rays | $iv$. Absorbed by the ozone layer of the atmosphere |
$a$ $b$ $c$ $d$