Consider diffraction in a ripple tank from two narrow slits. Answer true (T) or

Question

Consider diffraction in a ripple tank from two narrow slits. Answer true (T) or false (F) for each of the following statements. E.g., if the first statement is true and the rest false, enter TFFF. You have 6 tries.

1.If the frequency of the wave source is doubled, then the angle between the zeroth and first order fringes is halved.

2.If the distance between the slits is halved, then the angle between the zeroth and first order fringes is doubled.

3.If the frequency of the wave source is halved, then the phase speed of the waves doubles.

4.If the frequency of the wave source is halved and the space between the slits is doubled, then the angle between the zeroth and first order fringes stays the same.

Explanation / Answer

If the frequency of the wave source is doubled, then the angle between the zeroth

and first order fringes is halved. --- This statement is true.

If the distance between the slits is halved, then the angle between the zeroth and first order fringes is doubled.-- This statement is true

If the frequency of the wave source is halved, then the phase speed of the waves doubles. This is False.

If the frequency of the wave source is halved and the space between the slits is doubled, then the angle between the zeroth and first order fringes stays the same. - This is True.

So the answer will be TTFT.

Please comment if all the answers are right.

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