Power is inversely related to the focal length. So convex lens of focal length 20 cm has less power compared to that having focal length 10 cm
Power is ZERO Since power = 1/ focal length As focal length of plane mirror is infinity, its reciprocal is 0
Convert the focal length to meters, then take the reciprocal. That is how the "power" of a lens is calculated.
because manifying power has inerse relation with that of focal length
1.0 diopters
Power is inversely related to the focal length. So convex lens of focal length 20 cm has less power compared to that having focal length 10 cm
The tendency to converge the rays decides the power factor. So shorter the focal length converging is tremendous. Hence power is reciprocal of focal length
The magnifying power of a telescope is the focal length of the scope in millimeters, divided by the focal length of the eyepiece in millimeters. Focal length of scope: 225cm=2250mm Focal length of eyepiece: 7.5mm 2250/7.5= 300X
Power is ZERO Since power = 1/ focal length As focal length of plane mirror is infinity, its reciprocal is 0
it is zero . Power = 1/focal length The focal length of a plane glass or mirror is infinite, therfore power is zero
A lens of short focal length has a greater power (than a lens of large focal length)
Convert the focal length to meters, then take the reciprocal. That is how the "power" of a lens is calculated.
The focal length of a telescope is directly related to the magnification in that the longer the focal length, the more magnification you get from the telsceope. How the focal length of a telescope relates to the length of the telescope itself depends on the design of the telescope. In a refracting telescope, the focal length is approximately the length of the telescope. In a reflecting telescope, the focal length is roughly two time the length of the telescope.
Focal length is related to the lens. It has nothing to do with how near or far the object is to the lens or objective.
Power (F)= 1/focal length (f) focal length f, is measured in meters the power, F, is in dioptres (D) In converging or convex lenses the power is positive In diverging or concave lenses, the power is negative :)
The magnification, or power, at which a telescope is operating is a function of the focal length of the telescope's main (objective) lens (or primary mirror) and the focal length of the eyepiece employed.
because manifying power has inerse relation with that of focal length