A wavefront is an imaginary surface where: - Vidyadip

MCQ

A wavefront is an imaginary surface where:

✓
Phase is same for all points.
B
Phase changes at constant rate at all points along the surface.
C
Constant phase difference continuously changes between the points.
D
Phase changes all over the surface.

✓

Answer

Correct option: A.

Phase is same for all points.

The locus of all particles in a medium, vibrating in the same phase is called wave front.
The direction of propagation of light $($ray of light$)$ is perpendicular to the wave front.
A wave front is an imaginary surface where all particles lying on this vibrate in the same phase.

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

More "M.C.Q (1 Marks)" from Wave Optics→Wave Optics — all question types→Physics STD 12 Science question papers→Gujarat Board STD 12 Science question papers→Gujarat Board question paper generator→

Similar questions

When a resistance of 2ohm is connected across the terminals of a cell, the current is 0.5 amperes. When the resistance is increased to 5 ohm, the current is 0.25 amperes. The internal resistance of the cell is

The solid angle subtended by the total surface area of a sphere at the centre is:

A nucleus decays by ${\beta ^ + }$ emission followed by a gamma emission. If the atomic and mass numbers of the parent nucleus are $Z$ and $A$ respectively, the corresponding numbers for the daughter nucleus are respectively.

A coil of $200$ turns and area $0.20 \mathrm{~m}^2$ is rotated at half a revolution per second and is placed in uniform magnetic field of $0.01 \mathrm{~T}$ perpendicular to axis of rotation of the coil. The maximum voltage generated in the coil is $\frac{2 \pi}{\beta}$ volt. The value of $\beta$ is______________

A house is served by 220 V supply line in a circuit protected by a 9 ampere fuse. The maximum number of 60 W lamps in parallel that can be turned on, is

A conducting sphere of radius $R$ is given a charge $Q$. The electric potential and the electric field at the centre of the sphere respectively are

The adjoining figure shows two different arrangements in which two square wire frames are placed in a uniform constantly decreasing magnetic field $B.$ The value of magnetic flux in each case is given by

A conducting sphere of radius R = 20 cm is given a charge Q = 16μC. What is $\overrightarrow{\mathrm{E}}$ at centre

If a heavy nucleus has $N / Z$ ratio higher than that required for stability, then

Two electric bulbs whose resistances are in the ratio of 1 : 2 are connected in parallel to a constant voltage source. The powers dissipated in them have the ratio