Question

उस लेंस की फोकस दूरी ज्ञात कीजिए जिसकी क्षमता -2.0 D है । यह किस प्रकार का लेंस है ?

Answer 1

Answer:

we have power = -2.0 D

using P= 1/F

f= 1/-2.0

f = - 0.5

Answer 2

Answer:

-0.5 is correct answer

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