Question:medium
An aperture of size \(a\) is illuminated by a parallel beam of light of wavelength \(\lambda\). The distance at which ray optics has a good approximation is
An aperture of size \(a\) is illuminated by a parallel beam of light of wavelength \(\lambda\). The distance at which ray optics has a good approximation is
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Ray optics works when aperture size is large compared to wavelength.
Updated On: May 8, 2026
- \(\frac{a^2}{\lambda}\)
- \(\frac{\lambda}{a^2}\)
- \(\frac{\lambda}{a}\)
- \(\frac{\lambda^2}{a}\)
- \(a^2 \lambda\)
Show Solution
The Correct Option is A
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