2.2 Waves

Question 1

What is diffraction

Answer 1

Diffraction
the process by which
waves either bend
behind a barrier or the
wavefront is broken
up into many small
sources.

Question 2

What is refraction

Answer 2

Refraction is the changing in direction and speed of waves as they go from one medium to
another.

Question 3

Examples of diffraction

Answer 3

1. water waves which bend around a fixed object
2. the spread of colors in a rainbow
3. X-Ray Diffraction

Question 4

Examples of refraction

Answer 4

1. Twinkling of stars in a clear sky.
2. Pool of water appears to be less deep than what it actually is.
3. Rainbow formation in the sky.
4. Camera lenses.

Question 5

What is a medium in a wave

Answer 5

A medium is the substance through which a wave can propagate