1.Give
one reason why Huygens’ wave theory of light did not replace Newton’s theory of
light when the fringe pattern due to double slits was first observed. (1)
2.The
interference fringe pattern observed by M’n’M on their interferometer did not shift when
the apparatus was rotated by 90°. Explain the significance of this null
observation. (1)
3. Discuss the significance of Einstein’s
explanation of the photoelectric effect. (2)
4. Millikan
found that the charge on an oil droplet was always in multiples of e. Explain
the significance of this result. (1)
5. What
was the significance of Thompson’s calculations of the specific charge of an
electron? (2)
Turning Points questions also on kerboodle
Ms H
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