Download App

Universe — JEE physics STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 ScienceJEE physicsUniverse1 Mark
MCQ
An extremely hot star would appear to be
  • A
    Red
  • ✓
    Blue
  • C
    Yellow
  • D
    Orange
✓

Answer

Correct option: B.
Blue
According to Wien's law, $\lambda_m \propto \frac{1}{T}$. It means higher the temperature of a star, the lower is the wavelength of maximum intensity radiation emitted from star which tells the colour of star.

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 "MCQ" from Universe→Universe — all question types→JEE physics STD 12 Science question papers→CBSE Board STD 12 Science question papers→CBSE Board question paper generator→

Similar questions

Escape velocity on a planet is $v_e$. If radius of the planet remains same and mass becomes 4 times, the escape velocity becomes
→
Which of the following graphs is correct between kinetic energy $(E)$, potential energy $(L /)$ and height $(h)$ from the ground of the particle
→
A galvanometer having a resistance of $20\,\Omega $ and $30\, divisions$ on both sides has figure of merit $0.005\, ampere /division$. The resistance that should be connected in series such that it can be used as a voltmeter upto $15\, volt$ is ........... $\Omega$
→
Points $A$ and $B$ are situated perpendicular to the axis of a $2 \mathrm{~cm}$ long bar magnet at large distances $X$ and $3 X$ from its centre on opposite sides. The ratio of the magnetic fields at $A$ and $B$ will be approximately equal to
→
If the mass of earth is $80$ times of that of a planet and diameter is double that of planet and ' $g$ ' on earth is $9.8 \mathrm{~m} / \mathrm{s}^2$, then the value of ' $g$ ' on that planet is
→
The resonant frequency of a circuit is $f$. If the capacitance is made 4 times the initial values, then the resonant frequency will become
→
A ball of mass $m$ falls vertically to the ground from a height $h$ and rebound to a height $h_2$. The change in momentum of the ball on striking the ground is
→
A battery is charged at a potential of $15 V$ for $8$ hours when the current flowing is $10 A$. The battery on discharge supplies a current of $5 A$ for $15$ hours. The mean terminal voltage during discharge is $14.$ The "Watt-hour" efficiency of the battery is
→
A horizontal platform with an object placed on it is executing S.H.M. in the vertical direction. The amplitude of oscillation is $3.92 \times 10^{-3} m$. What must be the least period of these oscillations, so that the object is not detached from the platform
→
Assuming that universe is expanding, if the spectrum of light coming from a star which is going away from earth is tested, then in the wavelength of light
→