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The power of the combination of two lens x and y is 5d.if the focal length is 15 cm. calculate the py and fy. |
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Answer» tum angel ki jaisi lagti hoExplanation:Focal length of lens X = 15 cm = 0.15 mPower of lens X = 1/0.15= 100/15= 20/3= +6.66 DPower of Combination of lenses X & Y= power of lens X + power of lens Y5 = 6.66 + Power of lens YPOWER of lens Y = 5-6.66= -1.66 D----------------------------------------------(a) Focal length = 1/Powerf = 1/(-1.66)f = -0.6 MF = -60 cm------------------------------------–-------(b) As the focal length of lens Y is negative hence the nature of lens is DIVERGING lens, that is Concave lens.plz mark me |
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