Question

What is reflection? Write short answer

Answer 1

Reflection is the change in direction of a wavefront at an interface between two different media so that the wavefront returns into the medium from which it originated. Common examples include the reflection of light, sound and water waves. 

Answer 2

Reflection can be defined as:

• Reflection is the change in direction of a wavefront at an interface between two different media so that it returns to the medium from which it originated.
• Light, music and water waves are all examples of reflection.
• According to the law of reflection, the angle at which the wave is incident on the surface equals the angle at which it is reflected.
• Specular reflection occurs in mirrors.
• Reflection produces echoes in acoustics and is used in sonar.
• Reflection at VHF and higher frequencies are crucial for radio transmission and radar.
• Even hard X-rays and gamma rays can be reflected at shallow angles using special "grazing" mirrors.