Find the distance at which a ray of light having wavelength 600 nm can travel before broadening. The width of diffracting aperture is 4 mm.

Explanation

To find the distance at which a ray of light with a wavelength of 600 nm can travel before broadening through a diffracting aperture of width 4 mm, we can use the formula for the Fresnel distance (Zf). The Fresnel distance is given by:

\[ Z_f = \frac{A^2}{\lambda} \]

where:
- \( Z_f \) is the Fresnel distance,
- \( A \) is the width of the diffracting aperture,
- \( \lambda \) is the wavelength of the light.
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