(B) The Fraunhofer lines are dark absorption lines observed in the solar spectrum. When the continuous light emitted from the Sun's photosphere passes

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Absorption of radiations by chromosphere

(B) The Fraunhofer lines are dark absorption lines observed in the solar spectrum. When the continuous light emitted from the Sun's photosphere passes through the cooler outer layer known as the chromosphere,specific wavelengths of light are absorbed by the atoms present in the chromosphere. This selective absorption of light results in the appearance of dark lines in the otherwise continuous spectrum of the Sun,which are known as Fraunhofer lines.

Class 12 Physics Wave Optics Fresnel distance, Diffraction through circular slit, concept of Airy Disc, Rayleigh Criterion of Resolution , Fraunhofer diffraction

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The cause of Fraunhofer lines is

A
Reflection of radiations by chromosphere
B
Absorption of radiations by chromosphere
C
Emission of radiations by chromosphere
D
Transmission of radiations by chromosphere

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Class 12 Questions

Class 12

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Wave Optics

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Fresnel distance, Diffraction through circular slit, concept of Airy Disc, Rayleigh Criterion of Resolution , Fraunhofer diffraction

For what distance is ray optics a good approximation when the aperture is $3\; mm$ wide and the wavelength is $500\; nm$?

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$A$ Fraunhofer diffraction pattern due to a narrow slit is obtained on a screen placed at a distance $D$ from the slit whose slit width is $a$. The distance of the first secondary maximum from the central maximum is

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Explain that for a greater distance,the spreading due to diffraction dominates over that due to ray optics. $OR$ Explain the importance of Fresnel distance.

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Estimate the distance for which ray optics is a good approximation for an aperture of $4 \; mm$ and wavelength $400 \; nm$.

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What do the Fraunhofer lines in the solar spectrum indicate?

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The cause of Fraunhofer lines is

Similar Questions

For what distance is ray optics a good approximation when the aperture is $3\; mm$ wide and the wavelength is $500\; nm$?

$A$ Fraunhofer diffraction pattern due to a narrow slit is obtained on a screen placed at a distance $D$ from the slit whose slit width is $a$. The distance of the first secondary maximum from the central maximum is

Explain that for a greater distance,the spreading due to diffraction dominates over that due to ray optics. $OR$ Explain the importance of Fresnel distance.

Estimate the distance for which ray optics is a good approximation for an aperture of $4 \; mm$ and wavelength $400 \; nm$.

What do the Fraunhofer lines in the solar spectrum indicate?

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