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fgiga [73]
2 years ago
12

The power of a lens is 4. 0 diopters and its diameter is 5. 0 cm. what is the focal length of this lens?

Physics
1 answer:
fenix001 [56]2 years ago
8 0

The focal length of the lens is 25cm

given:

power,p=4 diopters

what is focal length?

Focal length is the distance between the point of convergence of your lens and the sensor or film recording the image.

what is diopter?

The unit of optical power of lens is called diopter.It is the optical power of the lens.

we know,

p=1/f

where,

p= power

f= focal length

f=1/p

f=1/4

=0.25m

=25cm

Thus,the focal length of the lens is 25cm

learn more about focal length from here: https/brainly.com/question/28203589

#SPJ4

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M=\frac{v^2 r}{G}=\frac{(3\cdot 10^7 m/s)^2(4.64\cdot 10^{11} m)}{6.67\cdot 10^{-11}}=6.26\cdot 10^{36}kg

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the mass of the black hole as a multiple of our sun's mass is

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R=\frac{2MG}{c^2}

where M is the mass of the black hole and c is the speed of light.

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