Question
When light is refracted, which of the following does not change?
  1. Wavelepgth.
  2. Frequency.
  3. Velocity.
  4. Amplitude.

Answer

  1. Frequency.
Explanation:
Frequency of a light wave doesnt change on changing the medium of propagation of light.

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

Similar questions

The phenomenon utilised in an optical fibre is(a) Refraction(b) Interference(c) Polarization(d) Total internal reflection
   
   
A 50 turns circular coil has a radius of 3 cm, it is kept in a magnetic field acting normal to the area of the coil. The magnetic field B  increased from 0.10 tesla to 0.35 tesla in 2 milliseconds. The average induced e.m.f. in the coil is(a) 1.77 volts(b) 17.7 volts(c) 177 volts(d) 0.177 volts
       
An $\alpha-$particle is bombarded on $^{14}N.$ As a result $,a ^{17}O$ nucleus is formed and a particle is emitted. This particle is $a:$
At neutral temperature, the thermoelectric power $\left(\frac{\mathrm{dE}}{\mathrm{dT}}\right)$ rias the value
The magnet can be completely demagnetized by(a) Breaking the magnet into small pieces(b) Heating it slightly(c) Droping it into ice cold water(d) A reverse field of appropriate strength
 
 
 
 
Choose the incorrect statement from the following: When two identical capacitors are charged individually to different potentials and connected parallel to each other after disconnecting them from the source(a) Net charge equals the sum of initial charges(b) The net energy stored in the two capacitors is less than the sum of the initial individual energies(c) The net potential difference across them is different from the sum of the individual initial potential difference(d) The net potential difference across them equals the sum of the individual initial potential differences
 
 
 
 
Figure shows electric field lines in which an electric dipole p is placed as shown. Which of the following statements is correct?
The intensity of the field generated at a point due to an electric dipole is directly proportional to:
To measure which of the following, is a tangent galvanometer used(a) Charge(b) Angle(c) Current(d) Magnetic intensity
       
In series L - C - R resonant circuit, to increase the resonant frequency: