In Young's double slit experiment the separation d between the slits is 2 mm , the wavelength λ of the light used is 5896 and distance D between the screen and slits is 100 cm . It is found that the angular width of the fringes is 0.20^ . To increase the fringe angular width to 0.21^ (with same λ an

In Young's double slit experiment the separation d between the slits is 2 mm , the wavelength λ of the light used is 5896 and distance D between the s - Physics MCQ NEET (UG) 2018 2026 | ExamTest.live

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In Young's double slit experiment the separation d between the slits is 2 mm, the wavelength λ of the light used is 5896 \overset{˚}{A} and distance D between the screen and slits is 100 cm . It is found that the angular width of the fringes is 0.2 0^{\circ} . To increase the fringe angular width to 0.2 1^{\circ} (with same λ and D) the separation between the slits needs to be changed to:

The angular width of the fringes (θ) is given by: θ = \frac{λ}{d} Since λ remains constant: θ_{1} d_{1} = θ_{2} d_{2} Substitute the values: 0.2 0^{\circ} \times 2 mm = 0.2 1^{\circ} \times d_{2} d_{2} = \frac{0.20 \times 2}{0.21} = \frac{0.40}{0.21} \approx 1.9 mm

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In Young's double slit experiment the separation d between the slits is 2 mm, the wavelength λ of the light used is 5896 \overset{˚}{A} and distance D between the screen and slits is 100 cm . It is found that the angular width of the fringes is 0.2 0^{\circ} . To increase the fringe angular width to 0.2 1^{\circ} (with same λ and D) the separation between the slits needs to be changed to:

2.1 mm

1.9 mm

1.8 mm

1.7 mm

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