In Huygens' eyepiece, condition for achromatism is satisfied. Explain.

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Huygens' eyepiece is an optical device that is used to observe distant objects by magnifying their image. It is a compound lens system consisting of two lenses - the eyepiece lens and the field lens. Huygens' eyepiece is also known as a Ramsden eyepiece.

Achromatism refers to the property of a lens system to produce an image that is free from chromatic aberration.
Chromatic aberration is an optical defect that causes different colors of light to focus at different points, resulting in blurred and distorted images.
Huygens' eyepiece satisfies the condition for achromatism because the two lenses are made from different types of glass, each with a different refractive index and dispersive power.
The eyepiece lens is made from a crown glass with a lower refractive index, while the field lens is made from a flint glass with a higher refractive index.
The difference in refractive indices of the two glasses helps to cancel out the chromatic aberration, resulting in a clear and sharp image.
In addition, Huygens' eyepiece also uses a small aperture to limit the amount of light that enters the system, which further reduces the effect of chromatic aberration.

Overall, the achromatic property of Huygens' eyepiece makes it a popular choice for astronomical observations, as it provides a clear and detailed image of celestial objects.

Huygens' eyepiece is an optical device

Huygens' Eyepiece as Optical Device

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In Huygens' eyepiece, condition for achromatism is satisfied. Explain.

CBSE CLASS XII Related Questions

1.
Two metal spheres of radii $r_1$ and $r_2$ ($> r_1$) having charges $q_1$ and $q_2$ respectively kept in air, are brought in contact. Which of the following statements is not correct ?

2.
With the help of a labelled diagram, explain the principle, construction and working of an a.c. generator.

3.
Consider the nuclear reaction \( X \to Y + Z \). Let \( M_x \), \( M_y \), and \( M_z \) be the masses of the three nuclei X, Y, and Z respectively. Then which of the following relations hold true?

4.
The resistance of a metal wire at \( 20^\circ \text{C} \) is \( 1.05 \, \Omega \) and at \( 100^\circ \text{C} \) is \( 1.38 \, \Omega \). Determine the temperature coefficient of resistivity of this metal.

6.
This ‘average velocity’ is found be few mm/s for currents in range of a few amperes. How then is current established almost the instant a circuit is closed ?

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In Huygens' eyepiece, condition for achromatism is satisfied. Explain.

CBSE CLASS XII Related Questions

1.Two metal spheres of radii $r_1$ and $r_2$ ($> r_1$) having charges $q_1$ and $q_2$ respectively kept in air, are brought in contact. Which of the following statements is not correct ?

2.With the help of a labelled diagram, explain the principle, construction and working of an a.c. generator.

3.Consider the nuclear reaction \( X \to Y + Z \). Let \( M_x \), \( M_y \), and \( M_z \) be the masses of the three nuclei X, Y, and Z respectively. Then which of the following relations hold true?

4. The resistance of a metal wire at \( 20^\circ \text{C} \) is \( 1.05 \, \Omega \) and at \( 100^\circ \text{C} \) is \( 1.38 \, \Omega \). Determine the temperature coefficient of resistivity of this metal.

6.This ‘average velocity’ is found be few mm/s for currents in range of a few amperes. How then is current established almost the instant a circuit is closed ?

Similar Physics Concepts

Comments

SUBSCRIBE TO OUR NEWS LETTER

1.
Two metal spheres of radii $r_1$ and $r_2$ ($> r_1$) having charges $q_1$ and $q_2$ respectively kept in air, are brought in contact. Which of the following statements is not correct ?

2.
With the help of a labelled diagram, explain the principle, construction and working of an a.c. generator.

3.
Consider the nuclear reaction \( X \to Y + Z \). Let \( M_x \), \( M_y \), and \( M_z \) be the masses of the three nuclei X, Y, and Z respectively. Then which of the following relations hold true?

4.
The resistance of a metal wire at \( 20^\circ \text{C} \) is \( 1.05 \, \Omega \) and at \( 100^\circ \text{C} \) is \( 1.38 \, \Omega \). Determine the temperature coefficient of resistivity of this metal.

6.
This ‘average velocity’ is found be few mm/s for currents in range of a few amperes. How then is current established almost the instant a circuit is closed ?