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If two +5 D, lenses are mounted at some distance apart, the equivalent power will always be negative, if the distance is

a)

Greater than 40 cm

b)

Equal to 10 cm

c)

Equal to 10 cm

d)

Less than 10 cm



Question ID - 152347 | SaraNextGen Top Answer

If two +5 D, lenses are mounted at some distance apart, the equivalent power will always be negative, if the distance is

a)

Greater than 40 cm

b)

Equal to 10 cm

c)

Equal to 10 cm

d)

Less than 10 cm

1 Answer
127 votes
Answer Key / Explanation : (a) -

(a)

When two lenses are separated by some distance , then equivalent power

Power  will be negative, if 10-25x will be negative

127 votes


127