Question
Question: Light of wavelength 5000Å incidents over a slit of width 1 mm. The angular width of central maxima w...
Light of wavelength 5000Å incidents over a slit of width 1 mm. The angular width of central maxima will be –
A
300
B
600
C
900
D
900
Answer
600
Explanation
Solution
For Ist minima;
sin q = aλ = 21 Þ q = 300
\ Angular width of central maxima = 2 × 30 = 60