MHT CET · Physics · Thermal Properties of Matter
Two stars ' \(\mathrm{P}\) ' and ' \(\mathrm{Q}\) ' emit yellow and blue light respectively. The relation between their temperatures \(\left(\mathrm{T}_{\mathrm{P}}\right.\) and \(\left.\mathrm{T}_{\mathrm{Q}}\right)\) is
- A \(\mathrm{T}_{\mathrm{P}}=\mathrm{T}_{\mathrm{Q}}\)
- B \(\mathrm{T}_{\mathrm{P}}=\frac{\mathrm{T}_{\mathrm{Q}}}{2}\)
- C \(\mathrm{T}_{\mathrm{P}}>\mathrm{T}_{\mathrm{Q}}\)
- D \(\mathrm{T}_{\mathrm{P}} < \mathrm{T}_{\mathrm{Q}}\)
Answer & Solution
Correct Answer
(D) \(\mathrm{T}_{\mathrm{P}} < \mathrm{T}_{\mathrm{Q}}\)
Step-by-step Solution
Detailed explanation
According to wien's law, \(\lambda T=\) constant
\(\therefore \mathrm{T} \propto \frac{1}{\lambda}\)
wavelength of blue light is less that than of yellow light.
Hence, temperature of \(\mathrm{Q}\) is greater than temperature of \(\mathrm{P}\).
\(\therefore \mathrm{T} \propto \frac{1}{\lambda}\)
wavelength of blue light is less that than of yellow light.
Hence, temperature of \(\mathrm{Q}\) is greater than temperature of \(\mathrm{P}\).
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from Physics
- The speed of light in two media \(c_1\) and \(c_2\) are \(1.5 \times 10^8 \mathrm{~m} / \mathrm{s}\) and \(2 \times 10^8 \mathrm{~m} / \mathrm{s}\) respectively. If the light undergoes total internal reflection, the critical angle between the two media isMHT CET 2022 Easy
- A long solenoid has 200 turns per cm and carriers a currenti. The magnetic field at its centre is \(6.28 \times 10^{-2} \mathrm{~Wb} / \mathrm{m}^2\). Another long solenoid has 100 turns per \(\mathrm{cm}\) and it carries a current \(\frac{i}{3}\). The value of magnetic field at its centre is nearlyMHT CET 2022 Hard
- Magnetic susceptibility of a paramagnetic substance isMHT CET 2019 Easy
- Three rings each of mass ' \(M\) ' and radius ' \(R\) ' are arranged as shown in the figure. The moment of inertia of system about axis YY' will be
MHT CET 2021 Easy - In Young's double slit experiment when a glass plate of refractive index 1.44 is introduced in the path of one of the interfering beams, the fringes are displaced by a distance ' \(y\) '. If this plate is replaced by another plate of same thickness but of refractive index 1.66, the fringes will be displaced by a distanceMHT CET 2023 Medium
- The ratio of energies of photons produced due to transition of electron of hydrogen atom from its (i) second to first energy level and (ii) highest energy level to \(2^{\text {nd }}\) level is respectivelyMHT CET 2020 Easy
More PYQs from MHT CET
- A ray of light travels from a denser medium to a rarer medium. The reflected and the refracted rays are perpendicular to each other. If ' \(\mathrm{r}\) ' and ' \(\mathrm{r}_1\) ' are the angle of reflection and refraction respectively and ' \(\mathrm{C}\) ' is the critical angle, then the angle of incidence isMHT CET 2021 Medium
- \(\int_{\frac{\pi}{5}}^{\frac{3 \pi}{10}}\left[\frac{\tan x}{\tan x+\cot x}\right] d x=\)MHT CET 2020 Easy
- The conductivity of an electrolytic solution decreases on dilution due toMHT CET 2019 Easy
- In Searle's method to find Young's modulus of a wire, when a force of \(1 \cdot 5 \mathrm{~kg}\) -wt is applied at its free end, the length of wire is ' \(a\) '. When force of \(2 \cdot 5\) kg-wt is applied, the length of wire is 'b'. What would be its original length?MHT CET 2020 Medium
- ANF carries out following functions EXCEPТ _____MHT CET 2020 Easy
- What is the IUPAC name of following compound?
MHT CET 2023 Easy