This section contains 2 questions. Each question contains statements given in two columns, which have to be matched. The statements in Column I are labelled A, B, C and D, while the statements in ColumnII are labelled p, q, r, s and t. Any given statement in Column I can have correct matching with ONE OR MORE statement(s) in Column II. The appropriate bubbles corresponding to the answers to these questions have to be darkened as illustrated in the following example: If the correct matches are A — p, s and t; B — q and r; C — p and q; and D~s and t; then the correct darkening of bubbles will look like the following.
Column I shows four situations of standard Young’s double slit arrangement with the screen placed far away from the slits $$S_1$$ and $$S_2$$. In each of these cases $$S_1P_0 = S_2P_0, S_1P_1 - S_2P_1 = \frac{\lambda}{4}$$ and $$S_1P_2 - S_2P_2 = \frac{\lambda}{3}$$, where $$\lambda$$ is the wavelength of the light used. In the cases B, C and D, a transparent sheet of refractive index $$\mu$$ and thickness t is pasted on slit $$S_2$$. The thicknesses of the sheets are different in different cases. The phase difference between thelight waves reaching a point P on the screen from the two slits is denoted by $$\delta(P)$$ and the intensity by $$I(P)$$. Match each situation given in Column I with the statement(s) in Column II valid for that situation.
Correct Answer: a-p-s b-q c-t d-r-s-t
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