Question 3: Wave Optics

Question

Assertion :
Distance between position of
bright and dark fringe remain same in YDSE.
Reason :
Fringe width, $$\beta=\frac{\lambda D}{d}$$

Accepted Answer

Distance between position of bright and dark
fringe is called fringe width in YoungÃ¢ÂÂs double slit
experiment, which is given by
$$\beta=\frac{D \lambda}{d}$$
where, $$\beta=$$ fringe width, $$D=$$ distance between source and screen, $$d=$$ distance between two slits and $$\lambda=$$ wavelength of monochromatic light wave. Therefore, In YDSE, fringes are of equal width, i.e., width of bright and dark fringes are same. Hence, both assertion and reason are true and reason is the correct explanation of assertion.

Answer

If both assertion and reason are true and reason is the correct explanation of assertion.

Answer

If both assertion and reason are true, but reason is not the correct explanation of assertion.

Answer

If assertion is true, but reason is false.

Answer

If both assertion and reason are false.

Wave Optics

Assertion : Distance between position of bright and dark fringe remain same in YDSE. Reason : Fringe width, $\beta=\frac{\lambda D}{d}

Choose the correct answer: