The power of a lens is -2.5 D. What kind of lens it is and what is its focal length?
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The power of a lens is -2.5 D. What kind of lens it is and what is its focal length?
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Answer:
here, p= -2.5 D
as, p=1/f
f= 1/p= -1/2.5= -0.4m
it is a concave lens as the focal length is negative.
{ in your previous question distance can't be negative so, it was 14 cm}
hope you understand ✨
দৈর্ঘ্য 100 / সেমি = 100 / -2 = -50 সেমি শক্তি
লেন্সের প্রকৃতি = উত্তল লেন্স
focus length 100/power in cm =100/-2=-50cm
nature of lens = convex lens