Question 222: Waves Optics

Question

In a Young's double slit experiment, the slits are separated by 0.3 mm and the screen is 1.5 m away from the plane of slits. Distance between fourth bright fringes on both sides of central bright is 2.4 cm. The frequency of light used is ______________ $$	imes$$ 1014 Hz.

Accepted Answer

8$$\beta$$ = 2.4 cm
$${{8\lambda \Delta } \over d}$$ = 2.4 cm
$${{8 	imes 1.5 	imes c} \over {0.3 	imes {{10}^{ - 3}} 	imes f}} = 2.4 	imes {10^{ - 2}}$$
f = 5 $$	imes$$ 10
14
Hz

Waves Optics

In a Young's double slit experiment, the slits are separated by 0.3 mm and the screen is 1.5 m away from the plane of slits. Distance between fourth bright fringes on both sides of central bright is 2.4 cm. The frequency of light used is ______________ $\times$ 1014 Hz.

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