TS EAMCET · Physics · Wave Optics
The distance for which ray optics becomes a good approximation for an aperture of 0.3 cm and a light of wavelength \(6000 Å\) is
- A 12 m
- B 15 m
- C 24 m
- D 30 m
Answer & Solution
Correct Answer
(B) 15 m
Step-by-step Solution
Detailed explanation
\(Z_F = \frac{a^2}{\lambda}\) \(Z_F = \frac{(0.3 \times 10^{-2} \text{ m})^2}{6000 \times 10^{-10} \text{ m}}\) \(Z_F = \frac{9 \times 10^{-6} \text{ m}^2}{6 \times 10^{-7} \text{ m}}\) \(Z_F = 15 \text{ m}\)
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