Diffraction

Light Through Large Opening

Produces sharp shadows because wavelength is very small

Sound Through Doorway

Spreads throughout the room because wavelength is comparable to doorway size.

wave behaves like a ray

Little diffraction →

strong spreading

Significant diffraction →

Edge Bending

Wave fronts bend at edges when passing through openings

Light Through Slits

Produces noticeable spreading due to diffraction

Laser Diffraction

Horizontal spreading of laser light after slits shows wave behavior.

Smaller slit

_____________ → more spreading.

wavelengths

Wave effects dominate when object size ≈ ___________

Yes, it is true

Is it true that Diffraction occurs for all waves, and not just the lights?

wave behavior

If bending/spreading is observed → _____________ is present

λ

(१)

Wave Fronts

(२)

Opening is very wide

(३)

Opening is about the same size as λ

(४)