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3 years ago

A standard biological microscope is required to have a magnification of 200Ã. what is the focal length of the objective?

Physics

1 answer:

NISA [10]3 years ago

7 0

Answer:

The focal length of the objective is L/20.

Explanation:

Given that,

Magnification of the standard biological microscope, m = 200

Let the magnification of the eyepiece is, $m_e=10$

Let $m_o$ is the magnification of objective lens. The formula of the magnification is given by :

$M=m_o\times m_e\\\\200=m_o\times 10\\\\m_o=20$

The formula of the magnification is given by :

$M=\dfrac{L}{f_o}m_e$

L is length of microscope

$f_o$ is focal length of the objective

$f_o=\dfrac{Lm_e}{M}\\\\f_o=\dfrac{10L}{200}\\\\f_o=\dfrac{L}{20}$

So, the focal length of the objective is L/20.

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an object has a mass of 50kg, a final height of 20m and an initial height of 8m. what is the amount of work done

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amount of work done is 5880 J

Given:

mass of object = 50kg

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initial height = 8m

To Find:

amount of work done

Solution:

work is done when a force acts upon an object to cause a displacement. You can calculate the energy transferred, or work done, by multiplying the force by the distance moved in the direction of the force.

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