Question
When an electron falls from a higher energy to a lower energy level, the difference in the energies appears in the form of electromagnetic radiation. Why cannot it be emitted as other forms of energy?
✓
Answer
As electrons interact only electromagnetically, so, the transition of an electron from a higher energy to a lower energy level can appears in the form of electromagnetic radiation.
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 convex lens of focal length $f_1$ is kept in contact with a concave lens of focal length $f_2$. Find the focal length of the combination.
→Explain how the width of depletion layer in a p-n junction diode changes when the junction is (i) forward biased (ii) reverse biased.
An electron accelerated by 1 kV travels 5 km towards conducting plate of infinite extension is moving in the direction perpendicular to the plate. Calculate the minimum surface charge density on the conducting plate so that the electron cannot collide with the plate.
Explain the arrangment of Geiger-Marsden's experiment of $\alpha$-particle scattering.
→The equation $\omega=\frac{\mu_\text{v}-\mu_\text{r}}{\mu-1}$ asderived for a prism having small refracting angle. Is it also valid for a prism of large refracting angle? Is it also valid for a glass slab or a glass sphere?
→A point charge is taken from a point A to a point B in an electric field. Does the work done by the electric field depend on the path of the charge?
Draw the transfer characteristic curve of a base biased transistor in CE configuration. Explain clearly how the active region of the $\mathrm{V}_0$ versus $\mathrm{V}_{\mathrm{i}}$ curve in a transistor is used as an amplifier.
→The two rails of a railway track, insulated from each other and from the ground, are connected to a millivoltmeter. What will be the reading of the millivoltmeter when a train travels on the track at a speed of $180km/h^{-1}?$ The vertical component of earth's magnetic field is $0.2 \times 10^{-4}$ T and the rails are separated by 1m.
→Three circuits, each consisting of a switch ' S ' and two capacitors, are initially charged as shown in the figure. In which circuit, when the switch is closed, the charge on the given capacitor will (i) increase, (ii) decrease and (iii) remain unchanged? Give reason.
Give brief explanation of modern solid state semi-conductor electronics.