MCQ
The wave nature of electrons was experimentally verified by,
- ✓Davisson and Germer
- Bde Broglie
- CHertz
- DEinstein
✓
Answer
Correct option: A.
Davisson and Germer
a
The wave nature of electrons was experimentally verified by Davisson and Germer.
The wave nature of electrons was experimentally verified by Davisson and Germer.
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
A block of mass $1.9\, kg$ is at rest at the edge of a table, of height $1\, m$. A bullet of mass $0.1\, kg$ collides with the block and sticks to it. If the velocity of the bullet is $20\, m / s$ in the horizontal direction just before the collision then the kinetic energy just before the combined system strikes the floor, is $....J$
→[Take $g =10\, m / s ^{2}$. Assume there is no rotational motion and loss of energy after the collision is negligable. $]$
The wing span of an aeroplane is $20$ $metre$. It is flying in a field, where the vertical component of magnetic field of earth is $5 ×10^{-5}$ tesla, with velocity $360\,km/h$. The potential difference produced between the blades will be.......$V$
→A stone of mass $20\, {g}$ is projected from a rubber catapult of length $0.1\, {m}$ and area of cross section $10^{-6} \,{m}^{2}$ stretched by an amount $0.04\, {m}$. The velocity of the projected stone is $....\,m\,/s.$ (Young's modulus of rubber $=0.5 \times 10^{9}\, {N} / {m}^{2}$ )
→Consider $3^{rd}$ orbit of $He^{+}$ (Helium) using non-relativistic approach , the speed of electron in this orbit will be
→[ given $K=9 \times 10^9$ constant ,$Z=2$ and $h$ (Planck 's constant) $=6.6\times10^{-34}\,\,Js$ ]
The figure shows the $P-V$ plot of an ideal gas taken through a cycle $ABCDA$. The part $ABC$ is a semi-circle and $CDA$ is half of an ellipse. Then,
→$(A)$ the process during the path $\mathrm{A} \rightarrow \mathrm{B}$ is isothermal
$(B)$ heat flows out of the gas during the path $\mathrm{B} \rightarrow \mathrm{C} \rightarrow \mathrm{D}$
$(C)$ work done during the path $\mathrm{A} \rightarrow \mathrm{B} \rightarrow \mathrm{C}$ is zero
$(D)$ positive work is done by the gas in the cycle $ABCDA$
Two identical discs of same radius $R$ are rotating about their axes in opposite directions with the same constant angular speed $\omega$. The disc are in the same horizontal plane.At time $t=0$, the points $P$ and $Q$ are facing each other as shown in the figure. The relative speed between the two points $P$ and $Q$ is $v_r$ as function of times best represented by
→If induction of magnetic field at a point is $B$ and energy density is $U$ then which of the following graphs is correct
→Using thomson's model of the atom, consider an atom consisting of two electrons, each of charge $-e$, embeded in a sphere of charge $+2e$ and radius $R$. In equilibrium each electron is at a distance $d$ from the centre of the atom. What is the equilibrium separation between electrons
→Which of the following statements is correct?
Newton's law of cooling is used in laboratory for the determination of the