A hypothetical atom has only three energy levels. The ground leve… - Vidyadip

MCQ

A hypothetical atom has only three energy levels. The ground level has energy, $E_1 = - 8\, eV$. The two excited states have energies, $E_2 = - 6\, eV$ and $E_3 = - 2\, eV$. Then which of the following wavelengths will not be present in the emission spectrum of this atom? .............. $nm$

A
$207$
✓
$465$
C
$310$
D
$620$

✓

Answer

Correct option: B.

$465$

b
$E = \frac{{hc}}{\lambda }$

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

NEET STD 11 Science question papers→Gujarat Board STD 11 Science question papers→Gujarat Board question paper generator→

Similar questions

The specific heat of a gas

At what height above the surface of earth the value of $"g"$ decreases by $2 \%$ ..... $km$ [radius of the earth is $6400 \,km$ ]

An open tube is in resonance with string (frequency of vibration of tube is $n_0$). If tube is dipped in water so that $75\%$ of length of tube is inside water, then the ratio of the frequency of tube to string now will be

A jar is filled with two non-mixing liquids $1$ and $2$ having densities $\rho_1$ and, $\rho_2$ respectively. A solid ball, made of a material of density $\rho_3$ , is dropped in the jar. It comes to equilibrium in the position shown in the figure.Which of the following is true for $\rho_1 , \rho_2$ and $\rho_3$?

A simple pendulum performs simple harmonic motion about $X = 0$ with an amplitude $A$ and time period $T$. The speed of the pendulum at $X = \frac{A}{2}$ will be

The dimensional formula ${M^0}{L^2}{T^{ - 2}}$ stands for

In a meter bridge, the null point is found at a distance of $25\, cm$ from $A$ . If now a resistance of $10\,\Omega $ is connected in parallel with $S$, the null point occurs at mid point of $AB$. The value of $R$ is .............. $\Omega$

Which of the following plots may represent the reactance of a series $LC$ combination

Determine the maximum acceleration in $m/s^2$ of the train in which a box lying on its floor will remain stationary, given that the co-efficient of static friction between the box and the train’s floor is $0.15.$

For a thermionic emitter (metallic) if J represents the current density and T is its absolute temperature then the correct curve between ${\log _e}\frac{J}{{{T^2}}}$ and $\frac{1}{T}$ is