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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 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).
Why a small focal length convex lens is used in simple microscope?
A small focal length convex lens is used in a simple microscope because it provides a higher magnification. The shorter focal length allows for the object to be placed closer to the lens, resulting in a larger apparent size and magnification of the object when viewed through the lens.
Why is convex lens of small focal-length preferred for magnifying glass?
A convex lens with a small focal length has a greater magnifying power, allowing it to produce a larger and clearer image when used as a magnifying glass. This is because the shorter focal length allows the lens to bend light rays more sharply, resulting in a more pronounced magnification effect.
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 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).
How do you find the power of lenses using focal lengths?
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 :)
Does a thinner and less convex lens have a shorter focal length and low optical power?
It is not necessary that a thinner convex lens have less optical power or a thicker lens has more optical power
Why a small focal length convex lens is used in simple microscope?
A small focal length convex lens is used in a simple microscope because it provides a higher magnification. The shorter focal length allows for the object to be placed closer to the lens, resulting in a larger apparent size and magnification of the object when viewed through the lens.
A concave lens is kept in contact with convex lens of focal length 20cm the combination works as a converging lens of focal length 100cmcalculate the power of concave lens?
i think it is -0.06m i.e. 6cm
Why is convex lens of small focal-length preferred for magnifying glass?
A convex lens with a small focal length has a greater magnifying power, allowing it to produce a larger and clearer image when used as a magnifying glass. This is because the shorter focal length allows the lens to bend light rays more sharply, resulting in a more pronounced magnification effect.
What is a positive lens the same as?
A positive lens is also called a magnifying lens. It has convex surfaces and it has a measureable focal length where it produces an inverted image of a distant object. The power in dioptres is the reciprocal of the focal length in metres.
Where a pen is placed in front of convex lens of image is equal to size of pen what will be power of lense indioptres?
If the image of the pen is the same size as the pen when placed in front of a convex lens, then it is at the focal point of the lens. The power of the lens in diopters is given by the formula: ( P = \frac{1}{f} ), where ( f ) is the focal length of the lens in meters. With the image distance being equal to the focal length, the power of the lens will be 1 diopter.
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
