Question

# A slit of size $$0.15\ cm$$ is placed at $$2.1\ m$$ from a screen. On illuminated it by a light of wavelength $$5 \times 10^{-5}\ cm$$. The width of central maxima will be

A
70 mm
B
0.14 mm
C
1.4 mm
D
0.14 cm

Solution

## The correct option is C $$1.4\ mm$$Width of central maxima $$=\dfrac{2 \lambda D}{d}$$$$=\dfrac{2 \times 2.1 \times 10^{-7}}{0.15 \times 10^{-2}}=1.4 \times 10^{-3}\ m=1.4\ mm$$Physics

Suggest Corrections

0

Similar questions
View More

People also searched for
View More