MCQ
The wave front due to a source situated at infinity is:
- ASpherical
- BCylindrical
- ✓Planar
- DNone of these
✓
Answer
Correct option: C.
Planar
when you considered it a large distance and measuring justice Mall section of it then it can be considered to be plane wavefront source at Infinity example the one coming from sun to earth surface is considered to be plain $VU$ friend from light diverging from a point source will be spherical.
So, the wave front due to a source situated at infinity is planar.
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 coil is suspended in a uniform magnetic field. with the plane of the coil parallel to the magnetio lines of force. When a current is passed through the coil it starts oscillating; It is very difficult to stop. But if an aluminium plate is placed near to the coil, it stops. This is due to :
A parallel plate capacitor is first charged and then isolated, and a dielectric slab is introduced between the plates. The quantity that remains unchanged is:
The wavelength of emission line spectrum and absorption line spectrum of a substance are related as
Two points $A$ and $B$ are situated at a distance $x$ and $2x$ respectively from the nearer pole of a magnet $2\ cm$ long. The ratio of magnetic field at $A$ and $B$ is:
→If Fresnel’s biprism experiment as held in water inspite of air, then what will be the effect on fringe width
Electric field lines of force:
A conducting wire connects two charged conducting spheres such that they attain equilibrium with respect to each other. The distance of separation between the two spheres is very large as compared to either of their radii.
The ratio of the magnitudes of the electric fields at the surfaces of the two spheres is
The ratio of the magnitudes of the electric fields at the surfaces of the two spheres is
The transition from the state n = 4 to n = 3 in a hydrogen-like atom results in ultraviolet radiation. Infrared radiation will be obtained in the transition
Points A and B are situated perpendicular to the axis of a 2cm long bar magnet at large distances X and 3X from its centre on opposite sides. The ratio of the magnetic fields at A and B will be approximately equal to
Calculate the charge on the second capacitor before and after switch in the circuit is closed
