Assertion :- Visible light cannot eject photo-electrons from copper surface, whose work \( P \) ...

Channel:
PW Solutions
Subscribers:
449,000
Published on ● Video Link: https://www.youtube.com/watch?v=z6t0QoRkIsA


Duration: 2:29
5 views
0

Assertion :- Visible light cannot eject photo-electrons from copper surface, whose work
\( P \) function is \( 4.4 \mathrm{eV} \).

W
Reason :- The threshold wavelength for copper
- surface is given by \( \lambda_{0}=\frac{h c}{\phi_{0}}=\frac{12400}{4.4}=2818 \AA \) which is less than the wavelength of visible light - \( (3800 \AA \) to \( 7800 \AA) \).
- (1) A
(2) B
(3) C
(4) D
- (A) Both assertion and reason are correct statements, and reason is the correct explanation of the assertion.
- (B) Both assertion and reason are correct statements, but reason is not the correct explanation of the assertion.
- (C) Assertion is correct, but reason is wrong statement.
- (D) Assertion is wrong, but reason is correct statement.
📲PW App Link - https://bit.ly/YTAI_PWAP
🌐PW Website - https://www.pw.live



Other Videos By PW Solutions


2022-12-01Assertion : Energy is released in nuclear fission. Reason : Total binding energy of the fission ...
2022-12-01Assertion: Although elements are different, their nuclei are of the same size. \( \mathrm{P} \) ...
2022-12-01Assertion : Neutrons are much effective as a bombarding particle. \( P \) Reason : Neutrons are ...
2022-12-01Assertion : The electron will be ejected from a hydrogen atom when electron beam of kinetic \( P...
2022-12-01Assertion : X-rays travel with the speed of light Reason : X-rays are electromagnetic rays. (1) ...
2022-12-01त्रिकोणमितीय सारणी का बिना प्रयोग किए, सिद्ध कीजिए \( \sec 25^{\circ}-\operatorname{cosec} 65^{\...
2022-12-01Assertion : Fragments produced in the fission of \( \mathrm{U}^{235} \) are radioactive. \( P \)...
2022-12-01Assertion : Radioactive nuclei can emit \( \beta^{-1} \) particles. Reason : Electrons exist ins...
2022-12-01Assertion :- Interference shows wave nature of light. Reason :- Photoelectric effect proves part...
2022-12-01A uniform electric field having strength \( \vec{E} \) is existing in x-y plane as shown in figu...
2022-12-01Assertion :- Visible light cannot eject photo-electrons from copper surface, whose work \( P \) ...
2022-12-01Assertion : A hydrogen atom can absorb a photon whose energy is greater than \( 13.6 \mathrm{eV}...
2022-12-01Assertion : In \( \mathrm{H} \)-atom, according to Bohrs theory, electron revolves around the nu...
2022-12-01Figure shows a system of three concentric metal shells A, B and C with radii a, 2a and 3a respec...
2022-12-01Assertion :- Binding energy (or mass defect) of hydrogen nucleus is zero. \( P \) Reason :- Hydr...
2022-12-01Assertion :- Hardness of \( \mathrm{x} \)-ray can be increased by increasing accelerating voltag...
2022-12-01Assertion :- Fusion requires very high temperatures. \( P \) Reason :- For fusion the light nucl...
2022-12-01Assertion :- Penetration power of hard X-ray is more than that of soft X-ray. \( \mathrm{P} \) R...
2022-12-01The higher oxidation states of transition elements are found to be the combination with \( \math...
2022-12-01त्रिकोणमितीय सारणी का बिना प्रयोग किए, सिद्ध कीजिए \[ \sec ^{2} 10^{\circ}-\cot ^{2} 80^{\circ}=1 \]
2022-12-01Assertion :- Cathode rays produce fluoresence in glass and colour of glow depends on nature of \...