>
Exams
>
Physics
>
Atomic Physics
>
the particle having zero mass is
Question:
The particle having zero mass is
Show Hint
Photons are massless particles that carry electromagnetic energy and travel at the speed of light.
AP EAPCET - 2023
AP EAPCET
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.
Download Solution in PDF
Was this answer helpful?
0
0
Top Questions on Atomic Physics
The smallest wavelength of Lyman series is \(91\ \text{nm}\). The difference between the largest wavelengths of Paschen and Balmer series is nearly _________ nm.
JEE Main - 2026
Physics
Atomic Physics
View Solution
As shown in the diagram, when the incident ray is parallel to base of the prism, the emergent ray grazes along the second surface. If refractive index of the material of prism is $\sqrt{2}$, the angle $\theta$ of prism is :
JEE Main - 2026
Physics
Atomic Physics
View Solution
Bohr’s radius of H-atom is \( 2.12 \times 10^{-10} \) m. Calculate the energy of electron at this level.
JEE Main - 2026
Physics
Atomic Physics
View Solution
Among the given options choose the correct energy of transition:
JEE Main - 2026
Physics
Atomic Physics
View Solution
Energy of first line of Lyman series - A Energy of second line of Balmer series - B Energy of first line of Balmer series - C Energy of second line of Lyman series - D What will be the correct decreasing order of energies of photons?
JEE Main - 2026
Physics
Atomic Physics
View Solution
View More Questions
Questions Asked in AP EAPCET exam
In a series LCR circuit, the voltages across the capacitor, resistor, and inductor are in the ratio 2:3:6. If the voltage of the source in the circuit is 240 V, then the voltage across the inductor is
AP EAPCET - 2025
Electromagnetic induction
View Solution
0.25 moles of $ \text{CH}_2\text{FCOOH} $ was dissolved in $ 0.5 \, \text{kg} $ of water. The depression in freezing point of the resultant solution was observed as $ 1^\circ \text{C} $. What is the van't Hoff factor? ($ K_f = 1.86 \, \text{K kg mol}^{-1} $)
AP EAPCET - 2025
Colligative Properties
View Solution
At $T(K)$, the vapor pressure of water is $x$ kPa. What is the vapor pressure (in kPa) of 1 molal solution containing non-volatile solute?
AP EAPCET - 2025
Colligative Properties
View Solution
At 300 K, vapour pressure of pure liquid A is 70 mm Hg. It forms an ideal solution with liquid B. Mole fraction of B = 0.2 and total vapour pressure of solution = 84 mm Hg. What is vapour pressure (in mm) of pure B?
AP EAPCET - 2025
Colligative Properties
View Solution
A 1% (w/v) aqueous solution of a certain solute is isotonic with a 3% (w/v) solution of glucose (molar mass 180 g mol$^{-1}$). The molar mass of solute (in g mol$^{-1}$) is
AP EAPCET - 2025
Colligative Properties
View Solution
View More Questions