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Question
The intensities of two interfering waves are l1 and l2. The best contrast in the interference pattern will be, when
The intensities of two interfering waves are l1 and l2. The best contrast in the interference pattern will be, when
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Solution
The correct option is B l1>>l2
Answer is B.
Light waves from two coherent, monochromatic sources will interfere constructively and destructively to produce a pattern of antinodes and nodes. Light traveling through the air is typically not seen since there is nothing of substantial size in the air to reflect the light to our eyes.
Locations where light constructively interferes corresponds to an abnormally bright spot. Locations where light destructively interferes corresponds to an abnormally dark spot. That is, the antinodes are locations where light from the two individual sources are reinforcing each other and correspond to points of brightness or maximum intensity (sometimes referred to as maxima). And the nodes are locations where light from the two individual sources are destroying each other and correspond to points of darkness or minimum intensity (sometimes referred to as minima).
Therefore, the best contrast in the interference pattern will be, when one of the intensities is far more than the other. In this case, the intensity l1 is very greater than l2.
Hence l1>>l2.
Answer is B.
Light waves from two coherent, monochromatic sources will interfere constructively and destructively to produce a pattern of antinodes and nodes. Light traveling through the air is typically not seen since there is nothing of substantial size in the air to reflect the light to our eyes.
Locations where light constructively interferes corresponds to an abnormally bright spot. Locations where light destructively interferes corresponds to an abnormally dark spot. That is, the antinodes are locations where light from the two individual sources are reinforcing each other and correspond to points of brightness or maximum intensity (sometimes referred to as maxima). And the nodes are locations where light from the two individual sources are destroying each other and correspond to points of darkness or minimum intensity (sometimes referred to as minima).
Therefore, the best contrast in the interference pattern will be, when one of the intensities is far more than the other. In this case, the intensity l1 is very greater than l2.
Hence l1>>l2.
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