What is the geometrical shape of the wavefront for light emerging out of a convex lens when a point-source is placed at the focus of the lens?

The shape of the wavefront in case of a light emerging out of a convex lens when a point source is placed at its focus is a parallel wave front as shown in the figure. The light from the source at the focus of a lens will emerge parallel and will form a plane wave front following the Huygens' principle.

E M B I B E

ISC Physics Class 12, Part-2>Chapter 6 - Wave Nature of Light : Huygens' Principle>QUESTIONS>Q 5

EASY

12th ICSE

IMPORTANT

Earn 100

What does the speed of light in vacuum depends on?

100% studentsanswered this correctly

Important Questions on Wave Nature of Light : Huygens' Principle

HARD

12th ICSE

IMPORTANT

ISC Physics Class 12, Part-2>Chapter 6 - Wave Nature of Light : Huygens' Principle>QUESTIONS>Q 6

Which colour of light travels slowest in glass ?

MEDIUM

12th ICSE

IMPORTANT

ISC Physics Class 12, Part-2>Chapter 6 - Wave Nature of Light : Huygens' Principle>QUESTIONS>Q 7

The index of refraction of a medium is $1.5$ . If the speed of light in air is $3 .0 \times 10^{8} {ms}^{- 1}$ , then what is speed of lights in the given medium ?