AP EAMCET · PHYSICS · Dual Nature of Matter
If the wavelength of a photon is \(4000 Å\), then its energy will be
- A \(4.95 \times 10^{-19} \mathrm{~J}\)
- B \(5.95 \times 10^{-19} \mathrm{~J}\)
- C \(3.95 \times 10^{-19} \mathrm{~J}\)
- D \(6.95 \times 10^{-19} \mathrm{~J}\)
Answer & Solution
Correct Answer
(A) \(4.95 \times 10^{-19} \mathrm{~J}\)
Step-by-step Solution
Detailed explanation
Wavelengh of photon, \(\lambda=4000 Å=4 \times 10^{-7} \mathrm{~m}\) Energy of photon, \(E=\frac{h c}{\lambda}\)…
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 parallel plate capacitor having capacity \(\mathrm{C}_0\) is charged to \(\mathrm{V}_0\). With battery disconnected, if the separation between the plates is doubled then the energy stored in it is \(E_1\). Instead if the separation between the plates is doubled, with battery in connection, the energy stored in it is \(\mathrm{E}_2\). Then the value of \(\frac{E_2}{E_1}\) isAP EAMCET 2023 Medium
- \(A\) force \(\mathbf{F}=(5 \hat{\mathbf{i}}+4 \hat{\mathbf{j}}) \mathrm{N}\) acts on a body and produces a displacement \(s=(6 \hat{\mathbf{i}}-5 \hat{\mathbf{j}}+3 \hat{\mathbf{k}}) \mathrm{m}\). The work done by the force isAP EAMCET 2020 Easy
- 'N' point charges are distributed into two groups and separated by a fixed distance. Then the ratio of maximum to minimum forces between the two groups is \((\mathrm{N}\) is even and greater than 2).
Options :AP EAMCET 2017 Medium - If \(10 \mathrm{gcms}^{-1}=x \mathrm{Ns}\), then the number \(x\) isAP EAMCET 2018 Easy
- Total emf produced in a thermocouple does not depend onAP EAMCET 2012 Easy
- Two charged particles of each of mass \(3 \mathrm{~g}\) and charge \(0.2 \mu \mathrm{C}\) stay in (vacuum) equilibrium on a horizontal surface with a separation of \(20 \mathrm{~cm}\). The coefficient of friction is
\(\left[\frac{1}{4 \pi \epsilon_0}=9 \times 10^9 \mathrm{Nm}^2 \mathrm{C}^{-2}\right]\left(\mathrm{g}=10 \mathrm{~ms}^{-2}\right)\)AP EAMCET 2017 Easy
More PYQs from AP EAMCET
- If the least positive integer n satisfying the equation \(\left(\frac{\sqrt{3}+\mathrm{i}}{\sqrt{3}-\mathrm{i}}\right)^{\mathrm{n}}=-1\) is p and the least positive integer \(m\) satisfying the equation \(\left(\frac{1-\sqrt{3} i}{1+\sqrt{3} i}\right)^m=\operatorname{cis} \frac{2 \pi}{3}\) is \(q\), then \(\sqrt{p^2+q^2}=\)AP EAMCET 2025 Medium
- If \((l, m)\) is the circumcentre of an equilateral triangle inscribed in the ellipse \(\frac{x^2}{a^2}+\frac{y^2}{b^2}=1\) having vertices at points with eccentric angles \(\theta_1, \theta_2\) and \(\theta_3\), then \(\frac{2}{3}\left[\cos \left(\theta_1-\theta_2\right)+\cos \left(\theta_2-\theta_3\right)+\cos \left(\theta_3-\theta_1\right)\right]=\)AP EAMCET 2019 Medium
- If \(1, \omega, \omega^2\) are the cube roots of unity, \(\mathrm{k}\) is positive integer and \(\left(1-\omega+\omega^2\right)^{3 \mathrm{k}}+\left(1-\omega^2+\omega\right)^{3 \mathrm{k}}=\left(1-\omega+\omega^2\right)^{3 \mathrm{k}+1}+\) \(\left(1+\omega-\omega^2\right)^{3 \mathrm{k}+1}\), then \(\mathrm{k}=\)AP EAMCET 2023 Medium
- \(P\) is a variable point on the ellipse \(\frac{x^2}{a^2}+\frac{y^2}{b^2}=1\) with foci \(F_1\) and \(F_2\). If \(A\) is the area of the triangle \(P F_1 F_2\), then the maximum value of \(A\) isAP EAMCET 2019 Medium
- Which of the following sets of reagents convert aniline to chlorobenzene ?AP EAMCET 2025 Medium
- Let \(f(x)=(x-a)(x-b)-\left(\frac{a+b}{2}\right)\). If \(f(x)=0\) has both non-negative roots, then the minimum value of \(f(x)\).AP EAMCET 2018 Medium