What does this mean?(1)
2.
Name two points that are
a) in phase and(1)
b) completely out of phase.(1)
3. What happens to the frequency of sound waves during interference?(1)
4. Water waves have a wavelength of 4 m and a speed of 3 m/s.
a) Calculate the frequency of the waves.(2)
b) Calculate the time it takes one wave to pass a point.(2)
5. Which part of a water wave will increase in size if the wave has more energy?(1)
6.What is constructive interference?(1)
7. For destructive interference
a) Do the waves meet in phase or out of phase?(1)
b) State the formula for path difference when we have destructive interference.(1)
8. Name the wave property that is the test of a wave.(1)
9. Name the three other characteristic behaviours of waves.(3)
10. Which colour of light in the visible spectrum has the longest wavelength?(1)
11. Which wavelength will diffract the most, long or short?(1)
12.
From S1 to point X is 68 cm.
From S2 to point X is 62 cm.
a) Calculate the wavelength of the microwaves.(2)
b) Calculate their frequency.(2)
13. State the approximate wavelengths for
a) red light(1)
b) green light(1)
c) blue light.(1)
14.
a) Calculate the wavelength of these light waves.(3)
b) What colour is this light?(1)
15.
The interference fringes shown are produced by red, green and blue light.
Which one is most likely to be the blue light?(1)
16. When projecting white light through a grating
I) a white central maximum is observed
II) several spectra are produced
III) blue fringes are nearest to the centre.
How do these three observations compare with white light dispersed into a spectrum by a prism?(3)
17.
Which of the following changes will increase the fringe spacing on the screen?(2)
a) Move the screen to the right, further away from the grating.
b) Use blue light instead of green.
c) Move the source of the green light to the left, further away from the grating.
d) Use a grating with more lines per meter.
18.
A beam of white light is directed through a grating with 600 lines/mm.
Calculate the angle between the red and violet ends of the spectrum for the first order maximum.(4)
Total marks = 39