iCON Education - Wave Optics BITSAT Test

Question 1: Palette 1/6

BITSAT 2025 MCQ

A beam of light travelling in water strikes a glass plate which is also immersed in water. When the angle of incidence is $60^{\circ}$, the reflected beam is found to be plane polarised. Find the refractive index of glass, if refractive index of water is $\sqrt{2}$.

$\sqrt{3}$

$\sqrt{\frac{3}{2}}$

$\sqrt{6}$

None of these

Question 2: Palette 2/6

BITSAT 2025 MCQ

In a Young's double slit experiment for a particular wavelength of light the distance between third dark and fifth bright fringe is 1.63 mm . If the distance between two slit is 1 mm and distance between slit and screen is 1 metre. Then, the wavelength of light is

$5.5 \times 10^{-7} \mathrm{~m}$

$6 \times 10^{-7} \mathrm{~m}$

$6.5 \times 10^{-7} \mathrm{~m}$

$7.5 \times 10^{-7} \mathrm{~m}$

Question 3: Palette 3/6

BITSAT 2024 MCQ

Young's double slit experiment is performed in a medium of refractive index of 1.33 . The maximum intensity is $ I_{0} $. The intensity at a point on the screen, where path difference between the light coming out from slits is $ \frac{\lambda}{4} $, is

$ \frac{I_{0}}{2} $

$ \frac{3 I_{0}}{8} $

$ \frac{2 I_{0}}{3} $

Question 4: Palette 4/6

BITSAT 2024 MCQ

In YDSE, monochromatic light falls on a screen 1.80 m from two slits separated by 2.08 mm . The first and second order bright fringes are separated by 0.553 mm . The wavelength of light used is

520 nm

639 nm

715 nm

None of these

Question 5: Palette 5/6

BITSAT 2023 MCQ

In a YDSE, the light of wavelength $\lambda=5000\mathop A\limits^o $ is used, which emerges in phase from two slits at $a$ distance $d=3 \times 10^{-7} \mathrm{~m}$ apart. A transparent sheet of thickness $t=1.5 \times 10^{-7} \mathrm{~m}$ and refractive index $\mu=1.25$ is placed over one of the slits. What is the new angular position of the central maxima of the interference pattern, from the centre of the screen? Find the value of $y$.

BITSAT 2023 Physics - Wave Optics Question 5 English

$7.2, \frac{D(\mu-1) t}{2 d}$

$7.2, \frac{D(\mu-1) t}{d}$

$6.2, \frac{D(\mu-1) t}{d}$

$5.2, \frac{2 D(\mu+1) t}{d}$

Question 6: Palette 6/6

BITSAT 2022 MCQ

In a young's double slit arrangement fringes are produced using light of wavelength 4000 $\mathop A\limits^o $. One slit is covered by a thin plate of glass of refractive index 1.4 and the other with another glass plate of same thickness but of refractive index 1.7. By doing so the central bright shifts to original sixth fringe from centre. Thickness of glass plate is ................. .

2 $\mu$m

8 $\mu$m

11 $\mu$m

16 $\mu$m