A wave is reflected from a rigid support. The change in phase on reflection will be

When a wave is reflected at a rarer surface,the change in phase is

When a wave is reflected at a rarer surface,the change in phase is

When a wave is reflected from a denser medium, the change in phase is:

Change Of Phase Due To Reflection

Given figure shows an incident pulse P reflected from a rigid support. Which one of following represents the reflected pulse correctly?

When light wave suffers reflection at the interface from air to glass, then the change in phase of the reflected wave is equal to

When light wave suffers reflection at the interface from air to glass, the change in phase of the reflected wave is equal to