Using light from a monochromatic source to study diffraction in a single slit of width 0.1 mm, the linear width of central maxima is measured to be 5 mm on a screen held 50 cm away. The wavelength of light used is _______________.
Fill in the blank with the correct answer from the options given below.
1
2.5 × 10–7 m
2
4 × 10–7 m
3
5 × 10–7 m
4
7.5 × 10–7 m