Define the term diffraction? What is the requirement for maximum diffraction? (2)

1
Define the term diffraction? What is the
requirement for maximum diffraction? (2)
2
Define the difference between constructive and
destructive interference (3)
3
What is the difference between a progressive and
a standing wave (2)
4
Define the terms, frequency, wavespeed and wave
length (3)
5
How is a standing wave produced? (3)
6
Define a node and antinode
7
What is the length equivalent to in picture 1 and
3? (2)
8
How will the diffraction pattern differ for a
coherent light source and one with white light?
(2)
9
2

1
3
Which part of the diagram is equivalent to x?
x D
l a
10
What features are similar to all transverse waves?
11
Why can only transverse waves be polarised?
12
What is a reasonable value for the wavelength of
UV light?
13
What are the three types of UV? Which type is
most likely to cause cancer?