Question
It is essential to consider light as a stream of photons to explain:
✓
Answer
- Photoelectric effect.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Four charges equal to $– Q$ are placed at the four corners of a square and a charge $q$ is at its centre. If the system is in equilibrium the value of $q$ is
→A horizontal straight conductor kept in north-south direction falls under gravity, then(a) A current will be induced from South to North(b) A current will be induced from North to South(c) No induce e.m.f. along the length of conductor(d) An induced e.m.f. is generated along the length of conductor
Assertion : Bohr had to postulate that the electrons in stationary orbits around the nucleus do not radiate.
Reason : According to classical physics all moving electrons radiate. (a) If both assertion and reason are true and the reason is the correct explanation of the assertion.(b) If both assertion and reason are true but reason is not the correct explanation of the assertion.(c) If assertion is true but reason is false.(d) If the assertion and reason both are false.
Reason : According to classical physics all moving electrons radiate. (a) If both assertion and reason are true and the reason is the correct explanation of the assertion.(b) If both assertion and reason are true but reason is not the correct explanation of the assertion.(c) If assertion is true but reason is false.(d) If the assertion and reason both are false.
The ionisation potential of hydrogen atom is 13.6 volt. The energy required to remove an electron in the n = 2 state of the hydrogen atom is(a) 27.2 eV(b) 13.6 eV(c) 6.8 eV (d) 3.4 eV
Five capacitors of $10\ \mu F$ capacity each are connected to $\text{a d.c.}$ potential of $100$ volts as shown in the adjoining figure. The equivalent capacitance between the points $A$ and $B$ will be equal to
→A point source of light is placed 4 m below the surface of water of refractive index 5 / 3. The minimum diameter of a disc which should be placed over the source on the surface of water to cut–off all light coming out of water is(a) 2 m(b) 6 m(c) 4 m(d) 3 m
A plane electromagnetic wave is incident on a material surface. The wave delivers momentum p and energy E.
A hollow sphere of charge does not have electric field at:
A tangent galvanometer is connected directly to an ideal battery. If the number of turns in the coil is doubled the deflection will:
An electric dipole is placed in an electric field generated by a point charge.
-
The net electric force on the dipole must be zero.
-
The net electric force on the dipole may be zero.
-
The torque on the dipole due to the field must be zero.
-
The torque on the dipole due to the field may be zero.