Q.

According to the Cartesian sign convention, in ray optics

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a

all distances are taken negatively

b

all distances in the direction of the incident ray are taken positively

c

all distances are taken positively

d

all distances in the direction of the incident ray are taken negatively

answer is D.

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Detailed Solution

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  • Positive distances are those that are measured in the same plane as the light's incident beam.
  • According to the Cartesian sign system, distances measured in the direction of the incoming light are regarded as positive.
  • Distances that are measured in the opposite direction from the direction of the incident light are said to be negative distances.
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