Radiation pressure or force on a surface from the intensity
This type of question, asked 5 times: 28 Jul 2022, 30 Jan 2023, 27 Jan 2024, 8 Apr 2024, 3 Apr 2025. All 5 questions below, oldest first.
Try each one first, then open its answer.
Question 1
28 Jul 2022
105Sun light falls normally on a surface of area and exerts an average force of within a time period of 20 minutes. Considering a case of complete absorption, the energy flux of incident light isTap an option to check your answer.
Question 2
30 Jan 2023
25A point source of light is placed at the centre of curvature of a hemispherical surface. The source emits a power of . The radius of curvature of hemisphere is and the inner surface is completely reflecting. The force on the hemisphere due to the light falling on it is____Question 3
27 Jan 2024
107An object is placed in a medium of refractive index 3. An electromagnetic wave of intensity falls normally on the object and it is absorbed completely. The radiation pressure on the object would be (speed of light in free space ):Tap an option to check your answer.
Question 4
8 Apr 2024
2Average force exerted on a non-reflecting surface at normal incidence is . If is the light energy flux during span of 1 hour 30 minutes. Then the area of the surface is:Tap an option to check your answer.
Question 5
3 Apr 2025
4The radiation pressure exerted by a 450 W light source on a perfectly reflecting surface placed at 2 m away from it, is :Tap an option to check your answer.