Q17.Average force exerted on a non-reflecting surface at normal incidence is 2.4 ร 10โ4 N. If 360 W/cm2 is the light energy flux during span of 1 hour 30 minutes, Then the area of the surface is: (1) 0.2 m2 (2) 20 m2 (3) 0.1 m2 (4) 0.02 m2
What This Question Tests
This question applies the concept of radiation pressure to calculate the area of a non-reflecting surface, given the average force and light energy flux.
Concepts Tested
Formulas Used
Force = (Power/c)
๐ NCERT Sections This Tests
11.4 โ Monochromatic Light Of Wavelength 632.8 Nm Is Produced By A
Physics Class 12 ยท Chapter 11
11.4 Monochromatic light of wavelength 632.8 nm is produced by a helium-neon laser. The power emitted is 9.42 mW. (a) Find the energy and momentum of each photon in the light beam, (b) How many photons per second, on the average, arrive at a target irradiated by this beam? (Assume the beam to have uniform cross-section which is less than the target area), and (c) How fast does a hydrogen atom have to travel in order to have the same momentum as that of the photon?
12.5 โ A Hydrogen Atom Initially In The Ground Level Absorbs A Photon,
Physics Class 12 ยท Chapter 12
12.5 A hydrogen atom initially in the ground level absorbs a photon, which excites it to the n = 4 level. Determine the wavelength and frequency of photon.
11.7 โ The Work Function For A Certain Metal Is 4.2 Ev. Will This Metal Give
Physics Class 12 ยท Chapter 11
11.7 The work function for a certain metal is 4.2 eV. Will this metal give hotoelectric emission for incident radiation of wavelength 330 nm?
๐ Question Details
- Chapter
- Dual Nature of Matter
- Topic
- Radiation pressure
- Year
- 2024
- Shift
- 08 Apr Shift 1
- Q Number
- Q17
- Type
- Numerical
- NCERT Ref
- Class 12 Physics Ch 11: Dual Nature of Radiation and Matter
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