What condition must be satisfied by a combina | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(B) Chromatic aberration occurs because the focal length of a lens depends on the wavelength of light. For a combination of two thin lenses in contact

Vedclass · Accepted Answer

$f_R = f_v$

Vedclass · Answer

(B) Chromatic aberration occurs because the focal length of a lens depends on the wavelength of light. For a combination of two thin lenses in contact,the condition for achromatism (elimination of chromatic aberration) is given by $\frac{\omega_1}{f_1} + \frac{\omega_2}{f_2} = 0$,where $\omega$ is the dispersive power and $f$ is the focal length.Specifically,for two lenses of different materials,the condition is $\frac{f_1}{\omega_1} + \frac{f_2}{\omega_2} = 0$. In the context of the focal lengths for red $(f_R)$ and violet $(f_v)$ light,the condition for the combination to be achromatic is that the dispersive power of the combination is zero,which effectively means the focal length of the combination is the same for both red and violet light,i.e.,$f_R = f_v$.

What condition must be satisfied by a combination of lenses to eliminate chromatic aberration?

Similar Questions

The chromatic aberration in lenses occurs due to

To remove the chromatic aberration,the combination of lenses should be such that

The rays of different colours fail to converge at a point after passing through a thick converging lens. This defect is called

Chromatic aberration is absent if two thin lenses in contact satisfy the condition:

Spherical aberration in a lens:

Vedclass Test Series

Exam Paper Generator

Online Exam Module