1. In a double-slit interference experiment, you are asked to use laser light of
ID: 1731543 • Letter: 1
Question
1. In a double-slit interference experiment, you are asked to use laser light of different wavelengths and determine the separation between adjacent bright spots. You observe that this separation is greatest when you illuminate the double slit with A) blue light. B) green light. C) yellow light. D) red light. E) The separation is the same for all wavelengths.
2. Which of the following changes would increase the separation between the bright fringes in the diffraction pattern formed by a double slit? – Check all that apply. A) Increase the wavelength of the light used. B) Increase the separation between the slits. C) Decrease the wavelength of the light used. D) Decrease the separation between the slits.
Explanation / Answer
Solution:
a) Ans: D red light
Reason: In a double-slit interference experiment as the separation is greatest, the wavelenght of the light should be maximum. In the given option red light has the maximum wavelenght compare to others.
b) Ans: A Increase the wavelength of the light used.
Reason: Same as above, As we are increasing the sepration, the wave lenght should be increased.
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