The Angular width of the Central Maximum in a Single slit Diffraction Pattern

Answer:- A scientist named ‘Young’ introduced an experiment called the ‘double slit experiment’. In this experiment, two slits are created and both of them are illuminated with a very bright source of light. A screen is put at equal distance (d) from slits. Now, the source of light emits the wavelength (λ). Let the width of slits be ‘b’. Now, the angle at which the superimposed waves illuminates the most is the ‘central maximum’. It can be carved out from the formula, 

sin θ = λ/b

If the slot is single, the central maximum angle will be 60°.