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10.2 , transmission of heat — Physics STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 SciencePhysics10.2 , transmission of heat1 Mark
MCQ
The cause of Fraunhoffer lines is
  • A
    Reflection of radiations by chromosphere
  • ✓
    Absorption of radiations by chromosphere
  • C
    Emission of radiations by chromosphere
  • D
    Transmission of radiations by chromosphere
✓

Answer

Correct option: B.
Absorption of radiations by chromosphere
b
(b)When the light emitted from the sun’s photosphere passes through it’s outer part Chromosphere, certain wave lengths are absorbed. In the spectrum of sunlight, a large number of dark lines are seen called Fraunhoffer lines.

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