MCQ
An extremely hot star would appear to be
  • A
     Red
  •  Blue
  • C
    Yellow
  • D
     Orange

Answer

Correct option: B.
 Blue
Blue

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

Similar questions

A light beam is described by $E=800 \sin \omega\left(t-\frac{x}{c}\right)$

An electron is allowed to move normal to the propagation of light beam with a speed of $3 \times 10^{7}\;{ms}^{-1}$. What is the maximum magnetic force exerted on the electron ?

In the case of amplitude modulation to avoid distortion the modulation index $(\mu)$ should be.
Binding energy per nucleon for $\mathrm{C}^{12}$  is $7.68\ MeV$ and for $\mathrm{C}^{13}$ is $7.74\ MeV.$ The energy required to remove a neutron from $\mathrm{C}^{13}$ is:
The mean value of current for half cycle for a current variation shown by the graph is
In the given nuclear reaction, how many $\beta$ and $\alpha$ particles are emitted $_{92}{X^{235}} \to {\;_{82}}{Y^{207}}$
It is necessary to coat a glass lens with a non-reflecting layer. If the wavelength of the light in the coating is $\lambda$ , the best choice is a layer of material having an index of refraction between those of glass and air and a thickness of
You are given that Mass of ${ }_{3}^{7} Li =7.0160\, u$ Mass of ${ }_{2}^{4} He =4.0026\, u$ and Mass of ${ }_{1}^{1} H =1.0079\, u$ When $20\, g$ of ${ }_{3}^{7} Li$ is converted into ${ }_{2}^{4} He$ by proton capture, the energy liberated, (in $kWh$ ), is: [Mass of nudeon $\left.=1\, GeV / c ^{2}\right]$
The binding energy of nucleus is a measure of its
What is the value of capacitance of a capacitor if it has a charge of $9C$ and voltage of $5V?$
A telescope using light having wavelength $5000\, Å$ and using lenses of focal $2.5$ and $30\, cm$. If the diameter of the aperture of the objective is $10\, cm$, then the resolving limit and magnifying power of the telescope is respectively