Onion epidermal cells act like transmission diffraction gratings when monochromatic laser light is incident upon them. The transverse width of the cell is analogous to the slit spacing (or separation) of a diffraction grating. An experiment using a 650 nm red laser produces the interference pattern shown below on a screen 1 m away from the onion cells. The distance between the second order maxima is indicated. Estimate the width of the onion cell 4.3 cm

Onion epidermal cells act like transmission diffraction gratings when monochromatic laser light is incident upon them. The transverse width of the cell is analogous to the slit spacing (or separation) of a diffraction grating. An experiment using a 650 nm red laser produces the interference pattern shown below on a screen 1 m away from the onion cells. The distance between the second order maxima is indicated. Estimate the width of the onion cell 4.3 cm