Question 375: Waves Optics

Question

In biprism experiment, 21 fringes are observed in a given region using light of wavelength 4800 $$\mathop A\limits^o $$. If light of wavelength 5600 $$\mathop A\limits^o $$ is used, the number of fringes in the same region will be

Accepted Answer

$$\begin{aligned} & 21 	imes \frac{\lambda_1 D}{d}=N 	imes \frac{\lambda_2 D}{d} \ & 	herefore N=21 \frac{\lambda_1}{\lambda_2}=\frac{21 	imes 4800}{5600}=18\end{aligned}$$

Answer

18

Answer

24

Answer

14

Answer

21

Waves Optics

In biprism experiment, 21 fringes are observed in a given region using light of wavelength 4800 $\mathop A\limits^o . If light of wavelength 5600 \mathop A\limits^o $ is used, the number of fringes in the same region will be

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