Question
If a transparent parallel plate of uniform thickness $t$ and refractive index $\mu$ is interposed perpendicularly in the path of a light beam, the optical path is(a) increased by $(\mu-1) t$(b) decreased by $\mu$(c) decreased by $(\mu-1) t$(d) increased by $\mu$
Step 1
In this case, the physical path length is the thickness of the plate, $t$, and the refractive index is $\mu$. Therefore, the optical path in the plate is $\mu t$. Show more…
Show all steps
Your feedback will help us improve your experience
Mahendra Kumar and 77 other Physics 103 educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
A plate of thickness $t$ made of a material of refractive index $\mu$ is placed in front of one of the slits in a double slit experiment. (a) Find the change in the optical path due to introduction of the plate. (b) What should be the minimum thickness $t$ which will make the intensity at the centre of the fringe pattern zero? Wavelength of the light used is $\lambda$. Neglect any absorption of light in the plate.
In a Young's double slit experimental arrangement shown here, if a mica sheet of thickness $t$ and refractive index $\mu$ is placed in front of the slit $S_{1}$, then the path difference $\left(S_{1} P-S_{2} P\right)$ (a) decreases by $(\mu-1) t$ (b) increases by $(\mu-1) t$ (c) does not change (d) increases by $\mu t$
A plate of thickness $t$ made of a material of refractive index $\mu$ is placed in front of one of the slits in a double slit experiment. What should be the minimum thickness $t$ which will make the intensity at the centre of fringe pattern zero? (a) $(\mu-1) \frac{\lambda}{2}$ (b) $(\mu-1) \lambda$ (c) $\frac{\lambda}{2(\mu-1)}$ (d) $\frac{\lambda}{(\mu-1)}$
Transcript
Watch the video solution with this free unlock.
EMAIL
PASSWORD