Which of the following physical phenomena are responsible for the formation of Rainbow when sunlight falls on drops of rain?
Refraction
Dispersion
Internal Reflection
All of the Above
Next Question
With reference to Sound waves consider the following statements:1. Human ear is capable of detecting sound waves ranging between approximately 20 Hz to 20 000 Hz.
2. Sound waves in air are Transverse waves, where displacement of the medium is parallel to the propagation of the wave.
3. Sound generally travels faster in gases and liquids than in Solid.
Which of the statements given above is/are correct?