MCQ
Infrared radiation is detected by
- ASpectrometer
- ✓Pyrometer
- CNanometer
- DPhotometer
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$\text{F = Mg}$
$\text{F}=\mu\text{Mg}$
$\text{Mg}\leq\text{F}\leq\text{Mg}\sqrt{1+\mu^2}$
$\text{Mg}\geq\text{F}\geq\text{Mg}\sqrt{1-\mu^2}.$

$\frac{1}{8}$
$\frac{1}{4}$
$4$
$8$