What is meant by power of a lens? Define its S.I. unit. You have two lenses A and B of focal lengths +10 cm and −10 cm respectively. State the nature and power of each lens. Which of the two lenses will form a virtual and magnified image of an object placed 8 cm from the lens? Draw a ray diagram to justify your answer.
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Power of a lens is the ability to converge or diverge the light rays depending upon its focal length
S.I. Unit of power is dioptre
A is convex and B is concave
A is the right answer
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S.I. Unit of power is dioptre
A is convex and B is concave
A is the right answer
Mark brainliest
Answered by
6
Answer:
the ability of lens to converge or diverge the ray of light is called power.
its S.I unit is dioptre . power is said to be 1 dioptre when a lens is having 1 m of focal length p=1/f
p=1/1=1D
Lens A
f=+10cm=0.1m
p=1/f
p=1/0.1=10D
lens is convex lens
Lens B
f=-0.1m
p=1/f
p=1/-0.1 = -10D
lens is concave lens
convex lens will form virtual and magnified image of the object
Explanation:
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