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Power in optics is inversely proportional to the focal length of a lens. A lens with a shorter focal length will have greater optical power, while a lens with a longer focal length will have less optical power. This relationship is important in determining the strength and magnification of corrective lenses used in eyeglasses and contact lenses.
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Which lens has a greater power convex lens of focal length 10 cm or a convex lens of focal length 20cm?
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
What is the power of a convex lens with 10cm focal length?
The power of a lens is calculated as the reciprocal of its focal length in meters. Therefore, a convex lens with a 10 cm focal length has a power of +10 diopters.
What is the power of 2 m focal lens?
The power of a lens is calculated as the reciprocal of its focal length in meters. Therefore, a 2 m focal length lens would have a power of 0.5 diopters.
What is the power of a convex lens whose focal length is 25 cm?
The power of a lens is the reciprocal of its focal length in meters. So, a lens with a focal length of 25 cm would have a power of +4 diopters (1/0.25 = 4).
What is the power of a lens of focal length 40cm?
The power of a lens is given by the formula P = 1/f, where f is the focal length of the lens. Therefore, for a lens with a focal length of 40cm, the power would be P = 1/40 cm = 0.025 diopters.
Which lens has a greater power convex lens of focal length 10 cm or a convex lens of focal length 20cm?
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
Why is power is used as reciprocal of focal length?
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
If the primary mirror of a telescope have a focal length of 225 centimeters and the eyepiece has a focal length of 7.5 millimeters then what is the magnifying power of the telescope?
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
What is the power of a convex lens with 10cm focal length?
The power of a lens is calculated as the reciprocal of its focal length in meters. Therefore, a convex lens with a 10 cm focal length has a power of +10 diopters.
What is the power of 2 m focal lens?
The power of a lens is calculated as the reciprocal of its focal length in meters. Therefore, a 2 m focal length lens would have a power of 0.5 diopters.
What is the power of a convex lens whose focal length is 25 cm?
The power of a lens is the reciprocal of its focal length in meters. So, a lens with a focal length of 25 cm would have a power of +4 diopters (1/0.25 = 4).
What is power of plane glass sheet?
it is zero . Power = 1/focal length The focal length of a plane glass or mirror is infinite, therfore power is zero
Which lens provides more magnification-a low power or a high power?
A lens of short focal length has a greater power (than a lens of large focal length)
What is the power of a lens of focal length 40cm?
The power of a lens is given by the formula P = 1/f, where f is the focal length of the lens. Therefore, for a lens with a focal length of 40cm, the power would be P = 1/40 cm = 0.025 diopters.
What is the magnifing power of the lens?
Depends on your microscope. We've got one that's a x2.
What would be the effect on magnification to increase the focal length of microscope and telescope?
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.
Do near objects have a longer focal length?
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.
