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Two monochromatic waves having frequencies $$\omega $$ and $$\omega + \Delta \omega \left( {\Delta \omega \ll \omega } \right)$$    and corresponding wavelengths $$\lambda $$ and $$\lambda - \Delta \lambda \left( {\Delta \lambda \ll \lambda } \right)$$    of same polarization, travelling along X-axis are superimposed on each other. The phase velocity and group velocity of the resultant wave are respectively given by
It is very important to study lambda biology as lambda phages are used for cloning purposes. Which of the statement is true for lambda phage?
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How are genes arranged in a lysogenic phage (for example a lambda phage)?
Choose the correct statement for the infectious particle of lambda phage.