Download App

Universe — Physics STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 SciencePhysicsUniverse1 Mark
MCQ
Fraunhofer lines of the solar system is an example of
  • A
    Emission spectrum
  • B
    Emission band spectrum
  • C
    Continuous emission spectrum
  • ✓
    Line absorption spectrum
✓

Answer

Correct option: D.
Line absorption spectrum
d
(d)Fraunhofer lines are produced by the absorption of rays of the Sun in the atmosphere. When white light from photosphere passes through chromosphere, the vapours and gases present in it absorbs certain wavelengths and produces dark lines (Fraunhofer lines).

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "M.C.Q (1 Marks)" from Universe→Universe — all question types→Physics STD 12 Science question papers→CBSE Board STD 12 Science question papers→CBSE Board question paper generator→

Similar questions

Light is an electromagnetic wave. Its speed in vacuum is given by the expression
→
If the number of turns and radius of cross section of the coil of a tangent galvanometer are doubled, then the reduction factor $K$ will become
→
An electric heater kept in vacuum is heated continuously by passing electric current. Its temperature
→
Wheatstones’s bridge cannot be used for measurement of very $......$ resistances.
→
A $10\,m$ long potentiometer wire has a potential gradient of $0.0025\, V/cm$. Calculate the distance of null point when the wire is connected to a $1.025\,V$ standard cell ............... $\mathrm{m}$
→
A planet which is born sister of earth is
→
In a fission reaction $_{92}^{236} \mathrm{U} \rightarrow 117_{\mathrm{X}}+117_{\mathrm{Y}}+\mathrm{n}+\mathrm{n}$, the binding energy per nucleon of X and Y is 8.5 MeV whereas of $236_U$ is 7.6 MeV. The total energy liberated will be about
→
The electric potential between a proton and an electron is given by $V = {V_0}\ln \frac{r}{{{r_0}}},$ where ${r_0}$ is a constant. Assuming Bohr’s model to be applicable, write variation of ${r_n}$ with $n$, $n $ being the principal quantum number
→
$1\%$ of light of a source with luminous intensity $50$ candela is incident on a circular surface of radius $10 \,cm$. The average illuminance of surface is
→
A concave and convex lens have the same focal length of $20 cm$ and are put into contact to form a lens combination. The combination is used to view an object of $5 cm$ length kept at $20 cm $ from the lens combination. As compared to the object, the image will be
→