If a source is at infinity, then wavefronts reaching to observer are

Question

If a source is at infinity, then wavefronts reaching to observer are (A) cylindrical (B) spherical (C) plane (D) conical

Tardigrade Admin · Accepted Answer

Rays reaching from a source at infinity are parallel and when we draw a surface perpendicular to each ray, we get a plane wavefront. <img class="img-fluid question-image" alt="image" src="https://cdn.tardigrade.in/img/question/physics/b0fd0cc8c66c85a9decd595db364c7c8-.png" />

Q. If a source is at infinity, then wavefronts reaching to observer are

cylindrical

spherical

plane

conical

Rays reaching from a source at infinity are parallel and when we draw a surface perpendicular to each ray, we get a plane wavefront.