MCQ
Infrared radiation are detected by:
- ASpectrometer
- BPyrometer
- CNanometer
- DPhotometre
Explanation:
Infrared radiation is detected by photometer.
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In image formation from spherical mirrors, only paraxial rays are considered because they:
A truth table is given below. Which of the following has this type of truth table
|
A |
0 |
1 |
0 |
1 |
|
B |
0 |
0 |
1 |
1 |
|
y |
1 |
0 |
0 |
0 |
|
(a) XOR gate |
(b) NOR gate |
(c) AND gate |
(d) OR gate |
Speed of recession of galaxy is proportional to it's distance
|
(a) Directly |
(b) Inversely |
(c) Exponentially |
(d) None of these |
In case of a virtual and erect image, the magnification created by the mirror is: