Define power of lens and write its si unit
Asked by admin @ in Physics viewed by 305 People
Define power of a lens.write its si units.
Answered by admin @
The ability of a lens to converge/diverge a beam of light rays is expressed in terms of its Power(P).
P=1/f
The SI unit of power of lens is Dioptre.It is denoted by the letter "D"
SI unit of length is metre(m)
therefore
1D = 1/m or 1D = 1m-1
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