Quiz on Huygen's Principle and Wave Optics

What does Huygen's Principle state about wavefronts?

• Wavefronts are always circular.

• Wavefronts do not spread in all directions.

• Wavefronts can only travel in straight lines.

• Each point of the wavefront is a source of secondary wavelets.

What type of wavefront does a point source emit according to Huygen's Principle?

• Spherical wavefront

• Cylindrical wavefront

• Planar wavefront

• Elliptical wavefront

What happens when a stone is thrown into water according to Huygen's Principle?

• Only the point of impact is affected.

• The water remains undisturbed.

• The waves only travel downward.

• Ripples form and spread in all directions.

According to Huygen's Principle, what is the new wavefront formed from?

• The tangential surface to all secondary wavelets.

• The original wavefront only.

• The interference of multiple wavefronts.

• The reflection of the wavefront.

What is the characteristic dimension for ray optics to be valid?

• Much smaller than the wavelength of light.

• Of the same order as the wavelength of light.

• Much larger than the wavelength of light.

• Exactly equal to the wavelength of light.

What did Huygen consider light needed to propagate?

• A highly elastic and less dense medium.

• An incompressible fluid.

• A vacuum.

• A solid medium.

What does Huygen's concept of secondary waves help to determine?

• The wavelength of light.

• The temperature of a medium.

• The pressure of a gas.

• The speed of sound.

What is the result of the disturbance caused by throwing a stone in water?

• A splash that quickly disappears.

• Concentric circles of ripples.

• A single wave moving outward.

• No visible effect.

What is the nature of the wavefronts formed after the initial disturbance in water?

• They dissipate immediately.

• They only move in one direction.

• They remain stationary.

• They spread out in concentric circles.

What happens to the disturbance in water over time?

• It reverses direction.

• It remains constant.

• It intensifies.

• It fades gradually.