Question

Between two coherent waves phase is

• A. $\phi (x)=$ constant
• B. $\phi (t)=$ constant
• C. $\phi (x) = \phi (t) =$ constant
• D. $\phi (x) \ne \phi (t)$

Answer 1

Answer: (A)

$\phi (x)=$ constant

Answer 2

Two sources are said to be coherent, if they emit light waves of same frequency or wavelength and of a stable phase difference ie,$\phi (x)=$ constant.