The black lines in the solar spectrum during | vedclass

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

Question

(B) Kirchhoff's Law states that good emitters are good absorbers at a given temperature. In the solar spectrum,the dark lines known as Fraunhofer line

Vedclass · Accepted Answer

Kirchhoff's law

Vedclass · Answer

(B) Kirchhoff's Law states that good emitters are good absorbers at a given temperature. In the solar spectrum,the dark lines known as Fraunhofer lines are formed because the cooler gases in the Sun's outer atmosphere (chromosphere) absorb specific wavelengths of light emitted by the hotter inner layers (photosphere). During a solar eclipse,when the bright photosphere is obscured by the Moon,the chromosphere becomes visible. At this moment,the emission spectrum of the chromosphere is observed,showing bright lines at the exact same wavelengths as the dark Fraunhofer lines. This phenomenon is a direct consequence of Kirchhoff's law,which explains why the same material that absorbs light at a specific wavelength will also emit light at that same wavelength.

The black lines in the solar spectrum during a solar eclipse can be explained by

Similar Questions

Which of the following is best close to an ideal black body?

Define emissivity and absorptivity and give their values for a perfect black body.

The graph shown in the adjacent diagram represents the variation of temperature $(T)$ of two bodies,$x$ and $y$,having the same surface area,with time $(t)$ due to the emission of radiation. Find the correct relation between their emissivities $(e)$ and absorptive powers $(a)$.

The absorption coefficient value of a perfect black body is

$A$ certain substance emits only the wavelengths ${\lambda _1}, {\lambda _2}, {\lambda _3}$ and ${\lambda _4}$ when it is at a high temperature. When this substance is at a colder temperature,it will absorb only the following wavelengths:

Vedclass Test Series

Exam Paper Generator

Online Exam Module