Question 7

A learner is investigating a certain phenomenon of light. He viewed red light through a single slit and observed the pattern that was formed on a screen. He repeated the experiment using blue light and observed the pattern on a screen again.

7.1 Name the phenomenon that the leaner is investigating. (1)

7.2 Draw separate diagrams for the patterns for red light and blue light that the
learner observed on the screen. Label clearly red and blue bands. (4)

7.3 Explain the differences observed in the patterns for red and blue light. (2)

7.4 Which nature of light does the phenomenon investigated demonstrate? (1)

7.5 What are the changes, if any, that the learner will observe if the slit width is
made smaller? Explain your answer. (3)


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