Question 2 :
A pile of plates to produce polarised light by refraction contains the glass plates kept inclined to the axis of tube at an angle (Given $\mu_g= 1.57$ and $\tan^{-1} 1.57 = 57.5^\circ{}$)<br/>
Question 4 :
Critical angle for certain medium is $sin^{-1}(0.6)$. The polarizing angle of that medium is :<br/>
Question 5 :
A light ray is incident on a glass slab it is partially reflected and partially transmitted. Then the reflected ray is<br>
Question 6 :
Consider the following statements A & B. Identify the correct choice in the given answers.<br/>(A) The refractive Index of the extra-ordinary ray depends on the angle of incidence in double refraction<br/>(B) The vibrations of light waves acquire onesidedness for both ordinary and extraordinary rays in double refraction<br/>
Question 8 :
Unpolarized light falls on two polarizing sheets so oriented that no light is transmitted. If a third polarizing sheet is placed between them; not parallel to either of the above two sheets in question:<br/>
Question 9 :
Why do polarized sun glasses block out some reflected light (glare), but do not block out light that has not been reflected?
Question 11 :
In a double=slit experiment, two parallel slits are illuminated first by light of wavelength $400nm$ and then by light of unknown wavelength. The fourth-order dark fringe resulting from the known wavelength of light falls in the same place on the screen as the second-order bright fringe from the unknown wavelength. The value of unknown wavelength of the light is<br>
Question 12 :
In an interference experiment, third bright fringe is obtained at a point on the screen with a light of $700\ nm$. What should be the wavelength of the light source in order to obtain $5$th bright fringe at the same point?
Question 13 :
A thin paper of thickness 0.02 mm having a refractive index 1.45 is placed across one of he slits in a Young's double slit experiment. The paper transmits 4/9 of the light energy falling on it. (a) Find the ratio of the maximum intensity to the minimum intensity in the fringe pattern. (b) How many fringes will cross through the center if an identical paper piece is pasted on the other slit also? The wavelength of the light used is 600 nm
Question 14 :
If the critical angle of a medium is 30$^{\circ}$, the polarizing angle for the medium is about <br/>
Question 15 :
Unpolarized light of intensity $I_0$ is incident on surface of a block of a glass of Brewster's angle. In that case, which one of the following statement is true?<br>
Question 16 :
In Young's double slit experiment, the $y$ coordinates of central maxima and $10th$ maximaare $2\ cm$ and $5\ cm$ respectively. When theapparatus is immersed in a liquid of refractiveindex $1.5$, the corresponding $y-$coordinates willbe:<br>
Question 17 :
The slits in a Young's double slit experiment have equal widths and the source is placed symmetrically relative to the slits. The intensity at the central fringes is $I_0$. If one of the slits closed, the intensity at this point will be
Question 18 :
In a YDSE, $D=1m, d=1mm$ and $\lambda=5000nm$. The distance of $100th$ maxima from the central maxima is
Question 19 :
Assertion: The unpolarised light and polarised light can be distinguished from each other by using polaroid.
Reason: A Polaroid is capable of producing plane polarised beams of light.
Question 20 :
Two point, monochromatic and coherent sources of light of wavelength $\lambda$ each are placed as shown in the figure. The initial phase difference between the sources is zero $0$. $(D>>d)$. Mark the correct statement(s).<br/>