Question 1[Maximum number: 3]Two sources of light produce an interference pattern on a screen.Determine the largest order of the diffraction pattern in which all the wavelengths in the incident beam are present.Show AnswerConsiders the largest wavelength ORθ=90∘\boldsymbol{O} \boldsymbol{R} \quad \theta=90^{\circ}ORθ=90∘dsinθ=nλ⇒n=10−3580sin90∘650×10−9=2.65d \sin \theta=n \lambda \Rightarrow n=\frac{10^{-3}}{580} \frac{\sin 90^{\circ}}{650 \times 10^{-9}}=2.65dsinθ=nλ⇒n=58010−3650×10−9sin90∘=2.65So the second order/ n=2Award [2] if smallest wavelengthused and an answer of n=3.Add to Test