MCQ
Photoelectric effect established that light
- ✓behaves like particles
- Bbehaves like magnetic fields
- Cbehaves like waves
- Dbehaves like rays
✓
Answer
Correct option: A.
behaves like particles
(a) behaves like particles
Explanation: The emission of free electrons from a metal surface when light is shone on it is called the photoemission or the photoelectric effect. This effect led to the conclusion that light is made up of packets or quantum of energy. Einstein already associated the light quantum with momentum. This strongly supported the particle nature of light and these particles were named photons. Thus, the wave-particle duality of light came into the picture. Einstein won the Nobel Prize for Physics not for his work on relativity, but for explaining the photoelectric effect.
Explanation: The emission of free electrons from a metal surface when light is shone on it is called the photoemission or the photoelectric effect. This effect led to the conclusion that light is made up of packets or quantum of energy. Einstein already associated the light quantum with momentum. This strongly supported the particle nature of light and these particles were named photons. Thus, the wave-particle duality of light came into the picture. Einstein won the Nobel Prize for Physics not for his work on relativity, but for explaining the 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
Major product will be
Total number of species from the following which can undergo disproportionation reaction________.
→$\mathrm{H}_2 \mathrm{O}_2, \mathrm{ClO}_3^{-}, \mathrm{P}_4, \mathrm{Cl}_2, \mathrm{Ag}, \mathrm{Cu}^{+1}, \mathrm{~F}_2, \mathrm{NO}_2, \mathrm{~K}^{+}$
Assign $A, B, C, D$ from given type of reaction.
$CuO + {H_2} \longrightarrow Cu \downarrow + {H_2}O$
→Identify the product $X$ is
→$\begin{array}{*{20}{c}}
{C{H_3} - C{H_2} - CH - C{H_3}}\\
{\,\,\,\,\,\,\,\,\,|}\\
{\,\,\,\,\,\,\,\,\,\,F\,}
\end{array}$ $\xrightarrow[\Delta ]{{alc.\,KOH}}$ $X$ (Major)
Which of the following is oxidised by $KMn{O_4}$
→Which one of the following orders presents the correct sequence of the increasing basic nature of the given oxides ?
In diamond crystal each carbon atom is linked with other carbon atoms. The number of carbon atoms in diamond unit cell is
The gas absorbs $100\, J$ and is simultaneously compressed by a constant external pressure of $1.50\, atm$ from $8\, lit$ to $2\, lit$ volume. Hence $\Delta U$ will be.....$J$
→Which molecule $AX_3$, $AX_4$, $AX_5$, $AX_6$ is most likely to have a trigonal bipyramidal structure if $A$ has no lone pair ?
→The $IUPAC$ name of Gammexane is
→