What is the power of convex lens having focal length 1cm?
Answer: 1 dioptre is SI unit of the power of a lens whose focal length is 1 metre. It is denoted by the letter D. Thus 1D = 1 m-1.
What is the power of lens if its focal length 1m?
One dioptre is the power of the lens whose focal length is 1m.
What is the power of convex lens whose focal length is 10 cm?
Thus, the powerof this convex lens is +10 dioptres which is also written as +10D.
What is the power of a lens of focal length cm?
Answer: The power of a lens is 1/focal length (measured in meters). So, 50 cm is 1/2 meter, so the power is -2; D stands for diopters, the unit of power for lenses. Hence, the power of a concave lens of focal length 50 cm is -2D.