The linear width of the central maximum in single slit Fraunhofer diffraction is:
$$\beta_0 = \frac{2\lambda D}{a}$$Given values in SI units:
- Linear width $\beta_0 = 5\,\text{mm} = 5 \times 10^{-3}\,\text{m}$
- Slit width $a = 0.1\,\text{mm} = 10^{-4}\,\text{m}$
- Distance to screen $D = 50\,\text{cm} = 0.5\,\text{m}$
Rearranging for wavelength $\lambda$:
$$\lambda = \frac{\beta_0 a}{2D} = \frac{(5 \times 10^{-3}\,\text{m})(10^{-4}\,\text{m})}{2 \times 0.5\,\text{m}} = \frac{5 \times 10^{-7}}{1.0} = 5 \times 10^{-7}\,\text{m}$$
(or $500\,\text{nm}$).
एकल झिरी विवर्तन में केंद्रीय उच्चिष्ठ की रेखीय चौड़ाई निम्न सूत्र से दी जाती है:
$$\beta_0 = \frac{2\lambda D}{a}$$दिए गए मान:
$\beta_0 = 5 \times 10^{-3}\,\text{m}$, $a = 10^{-4}\,\text{m}$, $D = 0.5\,\text{m}$
तरंगदैर्घ्य $\lambda$ का मान: