Q41. Light of uniform intensity shines perpendicularly on a totally absorbing surface, fully illumin

Q: What is the correct answer for CUET UG Physics Q41?

The correct answer is C. Radiation pressure (P_rad) is defined as the force exerted by electromagnetic radiation per unit area. For a totally absorbing surface, the radiation pressure is given by the formula P_rad = I/c, where I is the intensity of the incident light and c is the speed of light in vacuum. The problem states that the light has 'uniform intensity' and shines perpendicularly on the surface. If the area of th

Q: Q41. Light of uniform intensity shines perpendicularly on a totally absorbing surface, fully illuminating the surface. If the area of the surface is decreased, what is the effect on radiation…

The correct answer is C. Radiation pressure (P_rad) is defined as the force exerted by electromagnetic radiation per unit area. For a totally absorbing surface, the radiation pressure is given by the formula P_rad = I/c, where I is the intensity of the incident light and c is the speed of light in vacuum. The problem states that the light has 'uniform intensity' and shines perpendicularly on the surface. If the area of th

Q: What are the options for this CUET UG Physics question?

A. Increases · B. Decreases · C. Remains the same · D. Cannot be said

Question

Q41. Light of uniform intensity shines perpendicularly on a totally absorbing surface, fully illuminating the surface. If the area of the surface is decreased, what is the effect on radiation pressure?
(a) Increases
(b) Decreases
(c) Remains the same
(d) Cannot be said

FirstInTest · Accepted Answer

Radiation pressure (P_rad) is defined as the force exerted by electromagnetic radiation per unit area. For a totally absorbing surface, the radiation pressure is given by the formula P_rad = I/c, where I is the intensity of the incident light and c is the speed of light in vacuum. The problem states that the light has 'uniform intensity' and shines perpendicularly on the surface. If the area of the surface is decreased while the intensity of the light remains constant, the radiation pressure will not change because it depends only on the intensity of the incident radiation and the speed of light, not on the area of the surface. The total radiation force (F = P_rad * A) would decrease if the area A decreases, but the pressure itself remains constant.

Answer

Increases

Answer

Decreases

Answer

Remains the same

Answer

Cannot be said

Related Questionsin Physics

More from CUET UG

Browse CUET Questions by Subject

Practice More CUET UG Questions