MCQ
Infrared radiation is detected by
- ASpectrometer
- ✓Pyrometer
- CNanometer
- DPhotometer
✓
Answer
Correct option: B.
Pyrometer
b
(b)Infrared radiations are detected by pyrometer.
(b)Infrared radiations are detected by pyrometer.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Force $(F)$ and density $(d)$ are related as $F\, = \,\frac{\alpha }{{\beta \, + \,\sqrt d }}$ then dimension of $\alpha $ are
→A man is looking at a small object placed at his near point. Without altering the position of his eye or the object, he puts a simple microscope of magnifying power 5X before his eyes. The angular magnification achieved is:
The random error in the arithmetic mean of $100$ observations is $x$; then random error in the arithmetic mean of $400$ observations would be
→A bar of cross-sectional area $A$ is subjected two equal and opposite tensile forces at its ends as shown in figure. Consider a plane $BB'$ making an angle $\theta $ with the length The ratio of tensile stress to the shearing stress on the plane $BB'$ is
→A constant force $F$ is applied in horizontal direction as shown in figure. Contact force between $M$ and $m$ is $N$ and between $m$ and $M'$ is $N'$ then
→Displacement between maximum potential energy position and maximum kinetic energy position for a particle exciting $\text{S.H.M.}$ is:
→If due to air drag, the orbital radius of satellite decreases from $R$ to $R -\Delta R,\Delta R << R,$ expression for change in orbital velocity $\Delta v$ is [mass of earth $M$ ]
→Which of the following statements is correct
For a satellite moving in an orbit around the earth, the ratio of kinetic energy to potential energy is
A particle is projected horizontally from a tower with velocity $10\,m / s$. Taking $g=10\,m / s ^2$. Match the following two columns at time $t=1\,s$.
→| Column $I$ | Column $II$ |
| $(A)$ Horizontal component of velocity | $(p)$ $5$ SI unit |
| $(B)$ Vertical component of velocity | $(q)$ $10$ SI unit |
| $(C)$ Horizontal displacement | $(r)$ $15$ SI unit |
| $(D)$ Vertical displacement | $(s)$ $20$ SI unit |