Question

Try this practice question below! Monochromatic light from a helium-neon laser (lambda =632.8nm) shines at a right angle to a surface of a diffraction board (2 very small slits) that has a distance d=1/150500m between the slits. Find the angle at which you observe the first-order brightness (m=1)

$Try this practice question below! Monochromatic light from a helium-neon laser (lambda =632.8nm) shines at a right angle to a surface of a diffraction board (2 very small slits) that has a distance d=1/150500m between the slits. Find the angle at which you observe the first-order brightness (m=1)$

Solution

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ZadieMaster · Tutor for 5 years

Answer

$\theta = \arcsin\left(\frac{m \lambda}{d}\right)$ $\theta = \arcsin\left(\frac{1 \cdot 632.8 \times 10^{-9} \text{ m}}{\frac{1}{150500} \text{ m}}\right)$ $\theta = \arcsin(0.0952)$ $\theta = 5.47^\circ$

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