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A doctor has prescribed a corrective len...

A doctor has prescribed a corrective lens of power + 1.5 D. Find the focal length of the lens. Is the prescribed lens diverging or converging ?

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Given : `P=+1.5 D, f=?`
`f=(1)/(P)=(1)/(1.5)=(2)/(3)=0.667m=66.7 cm`
Since power is positive, the lens is diverging (concave).
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ZEN PUBLICATION-LIGHT - REFLECTION AND REFRACTION-QUESTIONS SECTION (TEXTUAL EXERCISE)
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  15. An object is placed at a distance of 10 cm from a convex mirror of foc...

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  17. An object 5.0 cm in length is placed at a distance of 20 cm in front o...

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  18. An object of size 7.0 cm is placed at 27 cm in front of a concave mirr...

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  19. Find the focal length of a lens pf power - 2.0 D. What type of lens is...

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