General wave properties

Question 1

what do waves transfer?

Answer 1

they transfer energy and not matter

Question 2

properties of reflection

Answer 2

1. waves reflect of smooth and plain surfaces
2. rough surfaces scatter light in all directions causing appearance to look matte and unreflective
3. frequency, wavelength and speed are unchanged
4. angle of incidence = angle of reflection

Question 3

properties of refraction

Answer 3

1. speed of wave changes through a new medium
2. more optically dense= speed decrease= bends toward/closer to normal
3. less optically dense= speed increase= moves away from normal
4. frequency remains the same
5. wavelength changes

Question 4

properties of diffraction

Answer 4

1. waves spread out through gap/past obstacle
2. narrow gap = large wavelength = more diffraction
3. frequency, wavelength and speed unchanged