Question 1
Estimate the distance (in cm) between the central bright region and the third dark fringe on a screen 5.00 m from two double slits 0.500 mm apart illuminated by 500-nm light.
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3.47
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2.15
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1.75
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1.50
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1.25
Question 2
For small angle approximations
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the angle must be 10° or less
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the angle must be 10 radians or less
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the angle must be 1° or less
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the angle must be 1 radian or less
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the angle must be 45° or less