Huygens’ Principle and Diffraction Activity

What happens to waves after passing through a narrow gap?

• They stop moving

• They spread out

• They disappear

• They move faster

According to Huygens’ Principle, every point on a wavefront acts as:

• A reflector

• A barrier

• A source of secondary wavelets

• A lens

Diffraction is greatest when:

• The gap is much larger than the wavelength

• The gap size is similar to the wavelength

• The waves are very fast

• The barrier is removed

Which type of wave commonly shows diffraction around corners?

• Sound waves

• X-rays

• Gamma rays

• Ultraviolet waves

What forms the new wavefront in Huygens’ Principle?

• Reflection only

• The overlapping of wavelets

• The speed of the wave

• The obstacle size

When waves pass through a wide gap, they:

• Spread out more

• Show less diffraction

• Stop completely

• Change color

Huygens’ Principle helps explain:

• Gravity only

• Diffraction and wave motion

• Chemical reactions

• Electric current only

Which statement best describes diffraction?

• Waves bouncing back

• Waves speeding up

• Waves spreading around obstacles or gaps

• Waves disappearing