CBSE-XI-Physics
17: Light Waves
- #7Is it necessary to have two waves of equal intensity to study interference pattern? Will there be an effect on clarity if the waves have unequal intensity?Ans : Interference pattern can be studied with waves of unequal intensity.
`` {\rm I}={{\rm I}}_{\mathit{1}}+{{\rm I}}_{\mathit{2}}+\mathit{2}\sqrt{\left[{{\rm I}}_{\mathit{1}}\times {{\rm I}}_{\mathit{2}}\right]}\mathit{cos}\left(\varphi \right)`` ,
where `` \varphi =\,\mathrm{\,phase\,}\,\mathrm{\,difference\,}``.
In case of waves of unequal intensities, the contrast will not be clear, as the minima will not be completely dark.
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