A simple microscope is used to see an object | vedclass

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(B) The magnifying power $(M)$ of a simple microscope is given by the formula: $M = 1 + \frac{D}{f}$, where $D$ is the least distance of distinct visi

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Magnifying power decreases.

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(B) The magnifying power $(M)$ of a simple microscope is given by the formula: $M = 1 + \frac{D}{f}$, where $D$ is the least distance of distinct vision and $f$ is the focal length of the lens.According to Cauchy's formula, the refractive index $(\mu)$ of a material depends on the wavelength $(\lambda)$ as $\mu \propto \frac{1}{\lambda^2}$. Since the wavelength of red light $(\lambda_r)$ is greater than the wavelength of blue light $(\lambda_b)$, the refractive index for red light is less than that for blue light $(\mu_r From the lens maker's formula, $\frac{1}{f} = (\mu - 1) \left( \frac{1}{R_1} - \frac{1}{R_2} \right)$, we see that $f \propto \frac{1}{\mu - 1}$. Since $\mu_r  f_b$.As the magnifying power $M = 1 + \frac{D}{f}$, an increase in focal length $(f)$ leads to a decrease in the magnifying power. Therefore, when changing from blue light to red light, the magnifying power decreases.

$A$ simple microscope is used to see an object first in blue light and then in red light. Due to the change from blue to red light, what is the effect on its magnifying power?

Similar Questions

Write the equation of magnification for a simple microscope when the image is formed at the near point.

What are the objective and the eye-piece in an optical instrument?

$A$ convex lens of focal length $12.5 \ cm$ is used as a simple microscope. When the image is formed at infinity,the magnification is . . . . . . . (Near point for normal vision is $25 \ cm$)

If in a compound microscope $m_1$ and $m_2$ are the linear magnifications of the objective lens and the eye lens respectively,then the magnifying power of the compound microscope will be:

What is a simple microscope? Obtain the equation of magnification for the image formed at the near point (normal vision distance).

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