Question:
The particle having zero mass is
The particle having zero mass is
Show Hint
Photons are massless particles that carry electromagnetic energy and travel at the speed of light.
Updated On: May 13, 2025
- proton
- neutron
- photon
- electron
Hide Solution
Verified By Collegedunia
The Correct Option is C
Solution and Explanation
A photon is a quantum of electromagnetic radiation and it is known to have zero rest mass. Unlike protons, neutrons, and electrons which are massive particles, photons can travel at the speed of light precisely because they are massless.
Was this answer helpful?
0
0
Top Questions on Atomic Physics
- An electron in Bohr model of hydrogen atom makes a transition from energy level \(-1.51 \, \text{eV}\) to \(-3.40 \, \text{eV}\). Calculate the change in the radius of its orbit. The radius of orbit of electron in its ground state is \(0.53 \, \text{\AA}\).
- CBSE CLASS XII - 2025
- Physics
- Atomic Physics
- Assertion (A): The potential energy of an electron revolving in any stationary orbit in a hydrogen atom is positive.
Reason (R): The total energy of a charged particle is always positive.- CBSE CLASS XII - 2025
- Physics
- Atomic Physics
- Assuming the validity of Bohr's atomic model for hydrogen-like ions, the radius of $ \text{Li}^{2+} $ ion in its ground state is given by $ \frac{1}{X} a_0 $, where $ a_0 $ is the first Bohr's radius.
- JEE Main - 2025
- Physics
- Atomic Physics
An electron in the hydrogen atom initially in the fourth excited state makes a transition to \( n^{th} \) energy state by emitting a photon of energy 2.86 eV. The integer value of n will be 1cm.
- JEE Main - 2025
- Physics
- Atomic Physics
- Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R. Assertion A : The Bohr model is applicable to hydrogen and hydrogen-like atoms only. Reason R : The formulation of Bohr model does not include repulsive force between electrons. In the light of the above statements, choose the correct answer from the options given below :
- JEE Main - 2025
- Physics
- Atomic Physics
View More Questions
Questions Asked in AP EAPCET exam
- If the solution of the system of simultaneous linear equations: $$ x + y - z = 6, $$ $$ 3x + 2y - z = 5, $$ $$ 2x - y - 2z + 3 = 0 $$ is \( x = \alpha, y = \beta, z = \gamma \), then \( \alpha + \beta = ?
- AP EAPCET - 2024
- Algebraic Methods of Solving a Pair of Linear Equations
If the ratio of the terms equidistant from the middle term in the expansion of \((1 + x)^{12}\) is \(\frac{1}{256}\), then the sum of all the terms of the expansion \((1 + x)^{12}\) is:
- AP EAPCET - 2024
- Binomial Expansion
A 3 kg block is connected as shown in the figure. Spring constants of two springs \( K_1 \) and \( K_2 \) are 50 Nm\(^{-1}\) and 150 Nm\(^{-1}\) respectively. The block is released from rest with the springs unstretched. The acceleration of the block in its lowest position is ( \( g = 10 \) ms\(^{-2}\) )
- AP EAPCET - 2024
- Hooke's Law
- If \( X \sim B(5, p) \) is a binomial variate such that \( p(X = 3) = p(X = 4) \), then \( P(|X - 3| < 2) = \dots \)
- AP EAPCET - 2024
- binomial distribution
- If the plane \[ x - y + z + 4 = 0 \] divides the line joining the points \[ P(2,3,-1) \quad \text{and} \quad Q(1,4,-2) \] in the ratio \( l:m \), then \( l + m \) is:
- AP EAPCET - 2024
- Section Formula
View More Questions