MHT CET · Physics · Dual Nature of Matter
When a photon enters glass from air, which one of the following quantity does \(\underline{\text { NOT }}\) change?
- A VeloCity
- B Energy
- C Momentum
- D Wavelength
Answer & Solution
Correct Answer
(B) Energy
Step-by-step Solution
Detailed explanation
\(x=A \sin \omega t, \quad,=\frac{d x}{d t}=\omega A \cos \omega t\)
\(T \cdot E=P \cdot E+K \cdot E, P_{0} E=\frac{1}{2} k x^{2}, K \cdot E =\) \(\frac{1}{2} m v^{2}\)
T. \(E=\frac{1}{2} \times k \times A^{2} \sin ^{2} \omega t+\frac{1}{2} m \omega^{2} A^{2} \cos ^{2} \omega t \quad,\) \(\omega=\sqrt{\frac{R}{m}}, k mv^{2}\)
T. \(E=\frac{1}{2} m \omega^{2} A^{2} \sin ^{2} \omega t+\frac{1 m \omega^{2} A^{2} c c^{2} \omega t}{2} \Rightarrow \frac{m \omega^{2} A^{2}}{2}\) \(=\frac{2 m \pi^{2} A^{2}}{T^{2}}\)
\(T \cdot E=P \cdot E+K \cdot E, P_{0} E=\frac{1}{2} k x^{2}, K \cdot E =\) \(\frac{1}{2} m v^{2}\)
T. \(E=\frac{1}{2} \times k \times A^{2} \sin ^{2} \omega t+\frac{1}{2} m \omega^{2} A^{2} \cos ^{2} \omega t \quad,\) \(\omega=\sqrt{\frac{R}{m}}, k mv^{2}\)
T. \(E=\frac{1}{2} m \omega^{2} A^{2} \sin ^{2} \omega t+\frac{1 m \omega^{2} A^{2} c c^{2} \omega t}{2} \Rightarrow \frac{m \omega^{2} A^{2}}{2}\) \(=\frac{2 m \pi^{2} A^{2}}{T^{2}}\)
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
- A stationary wave is represented by \(y=10 \sin \left(\frac{\pi x}{4}\right) \cos (20 \pi t)\) where \(x\) and \(y\) are in \(\mathrm{cm}\) and \(t\) in second. The distance between two consecutive nodes isMHT CET 2022 Medium
- A mass ' \(M\) ' is suspended by a rope from a rigid support at point ' \(P\) ' as shown in figure. Another rope is tied at end 'Q' and pulled horizontally with a force ' \(F\) '. If the rope makes an angle ' \(\theta\) ' with vertical then the tension in the string ' PQ ' is
MHT CET 2025 Medium - A frame made of metallic wire enclosing a surface area \(A\) is covered with a soap film. If the area of the frame of metallic wire is reduced by \(50 \%\), the energy of the soap film will be changed byMHT CET 2008 Easy
- In a biprism experiment, monochromatic light of wavelength ' \(\lambda\) ' is used. The distance between two coherent sources ' \(\mathrm{d}\) ' is kept constant. If the distance between slit and eyepiece ' \(D\) ' is varied as \(D_1, D_2, D_3 \& D_4\) and corresponding measured fringe widths are \(Z_1, Z_2, Z_3\) and \(Z_4\) thenMHT CET 2023 Hard
- The angular momentum of the electron in the third Bohr orbit of hydrogen atom is ' \(l\) '. Its angular momentum in the fourth Bohr orbit isMHT CET 2024 Easy
- For polyatomic gases, the ratio of molar specific heat at constant pressure to constant volume is \((\mathrm{f}=\) degrees of freedom \()\)MHT CET 2023 Medium
More PYQs from MHT CET
- \(\mathrm{F}(\mathrm{x})=\log |\sin \mathrm{x}|\), where \(\mathrm{x} \in(0, \pi)\) is strictly increasing onMHT CET 2021 Medium
- Identify a complex having monodentate ligand from following:MHT CET 2024 Easy
- A metal wire 108 meters long is bent to form a rectangle. If the area of the rectangle
is maximum, then its dimensions areMHT CET 2020 Easy - The IUPAC name of following compound is:
MHT CET 2023 Easy - Five solid spheres each of mass \(m\) and radius \(r\) are rotating about an axis \(A\) as shown in figure. Hence the moment of inertia of the system about the axis of rotation A-A' as shown in figure. Hence the moment of inertia of the system about the axis of rotation A-A' is
MHT CET 2022 Medium - Which among following is true for the value of Henry's law constant K?MHT CET 2020 Easy