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Student 1 and Student 2 conducted experiments using coherent sources of light, with Student 1 using…
Student 1 and Student 2 conducted experiments using coherent sources of light, with Student 1 using a single slit and Student 2 using a double slit.
Answer the following questions:
(a)
Identify the patterns resulting from Student 1 and Student 2 experiments.
(b)
Give two reasons that assisted you in recognizing the patterns.
(c)
Upon utilizing a monochromatic source of light of 500 nm wavelength, Student 1 observed that the distance between the initial minimum and the centre of the fringe matched the width of the slit. Calculate the distance of this initial minimum from the centre of the fringe, given that the screen is situated 1 m away from the slit.
(d)
Student 2 observes 10 fringes within a specific portion of the screen using the same monochromatic source of light. If he were to immerse his entire experimental setup in a liquid of refractive index 5/3, what alteration should he make to the distance of the screen to maintain the same number of fringes?
Answer
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From ISC 2025 Practice Physics, question 92.