Which of the following generates a plane wavefront ?

Question

Which of the following generates a plane wavefront ? (A) α-rays (B) β-rays (C) &gamma;-rays (D) None of these

Tardigrade Admin · Accepted Answer

When the point source or linear source of light is at very large distance, a small portion of spherical or cylindrical wavefront appears to be plane, such a wavefront is called a plane wavefront.

In the given options none of sources generates plane wavefront, it can be artificially produced by reflection from a mirror or by refraction through a lens.

Q. Which of the following generates a plane wavefront ?

$α - r a ys$

$β - r a ys$

$γ - r a ys$

None of these

Q. Which of the following generates a plane wavefront ?

α−rays

β−rays

γ−rays

None of these

$α - r a ys$

$β - r a ys$

$γ - r a ys$