A monochromatic infrared range finder of power 1milli watt emits photons with wavelength 1000 nm in 0.1 second. The number of photons emitted in 0.1 second is:
(Given: h = \(6.626 \times 10^{-34} J~s\) , c = \(3 \times 10^8 m~s^{-1}, \) Avogadro number = \(6.022 \times 10^{23}\))
1. \(30 \times 10^{37}\)
2. \(5 \times 10^{14} \)
3. \(30 \times 10^{34} \)
4. \(5 \times 10^{11} \)
Match types of wave in column I with the corresponding frequency in column II
and mark the appropriate option:
Column I (Types of Wave) |
Column II (Corresponding Frequency) |
||
A. | X-rays | I. | |
B. | Ultraviolet wave (UV) | II. | |
C. | Long radio waves | III. | |
D. | Microwave | IV. |
A | B | C | D | |
1. | IV | I | III | II |
2. | I | IV | II | III |
3. | I | IV | III | II |
4. | IV | III | I | II |