Question

The distance estimation for which ray optics is a good approximation for an aperture of \(3\ \text{mm}\) and wavelength \(300\ \text{nm}\) would be:

• A. \(40\ \text{m}\)
• B. \(30\ \text{m}\)
• C. \(20\ \text{m}\)
• D. \(10\ \text{m}\)

Hint:

For ray optics approximation, use the distance estimate \(L\approx \frac{a^2}{\lambda}\).

Answer 1

The Correct Option is B