Question 1 :
When an unpolarized light of intensity $I_{0}$ isincident on a polarizing sheet, the intensity ofthe light which does not get transmitted, is :<br>
Question 2 :
A beam of unpolarised light passes through a tourmaline crystal $A$ and then through another such crystal $B$ oriented so that the principal plane is parallel to $A$. The intensity of emergent light is $\displaystyle I$. If $A$ now rotated by $45^{o}$ in a plane perpendicular to direction ofthe incident ray. The emergent light will have intensity.
Question 3 :
Young's experiment is performed in air and then performed in water, the fringe width
Question 4 :
In a diffraction pattern by a wire, on increasing diameter of wire, fringe width
Question 5 :
In Fresnel bi-prism experiment, the distance between the source and the screen $1m$ and that between the source and bi-prism is $10cm$. The wavelength of light used is $6000A^o$. The fringe width obtained is $0.03cm$ and the refracting angle of bi-prism is $1$. The refractive index of the material of bi-prism is
Question 6 :
The fringe width of interference fringes for red colour is $\beta $. The fringe width for violet colour will be nearly :<br/>$(\lambda_{Red} = 620-740  nm, \lambda _{Violet} = 380-450  nm)$<br/>
Question 7 :
Microwaves from a transmitter are directed normally toward a plane reflector. A detector moves along the normal to the reflector. Between positions of 14 successive maxima the detector travels a distance $0.14m$. The frequency of the transmitter is ($c=3\times {10}^{8}m$ ${s}^{-1}$)<br>
Question 8 :
In a Young's double slit experiment the fringe width is $0.2\ mm$. If the wavelength of light used is increased by $10\%$ and the separation between the slits is also increase by $10\%$ the fringe width will be
Question 9 :
In a Young's double slit experiment, the source is white light. One of the holes is covered by a red filter and another by a blue filter. In this case
Question 10 :
The intensity at the maximum in Young's double slit experiment is $I_o$. The distance between two slits is d = 5 $\lambda$, where $\lambda$ is the wavelength of light used in the experiment. What will be the intensity in front of one of the slits on the screen placed at a distance D = 10d?
Question 11 :
A thin mica sheet of thickness $2 \times 10^{-6}m$ and refractive index $(\mu = 1.5)$ is introduced in the path of the first wave. The wavelength of the wave used is $5000\ \mathring{A}$. The central bright maximum will shift.
Question 12 :
In Young's double slit experimental set up, if the wavelength is doubled, the band width $\beta $ becomes :
Question 13 :
In Young's double slit experiment, wavelength of light is $6000\mathring{A}$. Then the phase difference between the light waves reaching the third bright fringe from the central fringe will be:
Question 14 :
High quality camera lenses are often coated to prevent reflection. A lens has an optical index of refraction of $1.72$ and a coating with an optical index of refraction of $1.31$. For near normal incidence the minimum thickness of the coating to prevent reflection forwavelength of $5.3 \times 10^{-7} m$ is :<br>
Question 15 :
In Young's double slit experiment how many maximas can be obtained on a screen ( including the central maximum ) on both sides of the central fringe if $\lambda=2000\ A^o$ and $d=7000\ A^o$
Question 16 :
The two coherent sources of equal intensity produce maximum intensity of $100$units at a point. If the intensity of one of the sources is reduced by $36\%$ by reducing its width then the intensity of light at the same point will be
Question 17 :
A biprism is placed at a distance of 50 mm in front of a narrow slit illuminated by light of wavelength 600 nm . The virtual images formed by the biprism are 0.5 mm apart . Find the width of the fringes formed on a screen placed 0.75 m apartin front of the biprism.
Question 18 :
Distance of $5^{th}$ dark fringe from centres is $4\ mm$. If $D = 2\ m, \lambda = 600\ nm$, then distance between slits is
Question 19 :
In Young's Double Slit Experiment intensity at a point is (1/4) of the maximum intensity. Angular position of the point is:<br>
Question 22 :
When an unpolarized light of intensity, $\displaystyle I_o$ is incident on a polarizing sheet, the intensity of light which does not get transmitted is  :<span class="_wysihtml5-temp">
Question 23 :
If Young's double slit experiment is performed in water instead of air, then
Question 24 :
The source is at some distance from an obstacle. Distance between obstacle and the point of observation is $b$ and wavelength of light is $\lambda$. The distance of $n^{th}$ Fresnel Zone from the point of observation is :<br/>
Question 25 :
In Young's double slit experiment the intensity of the maxima is $I$. If the width of each slit is doubled, the intensity of the maxima will be:<br/>
Question 26 :
In Young's double slit experiment, we get 10 fringes in the field of view of monochromatic light of wavelength 4000$\overset{o}{A}$. If we use monochromatic light of wavelength 5000$\overset{o}{A}$, then the number of fringes obtained in the same field of view is
Question 27 :
Two coherent monochromatic light beams of intensities $4l$ and $9l$ are superimposed. The maximum and minimum possible intensities in the resulting beam are
Question 28 :
A Young’s double slit experiment is conducted with slit separation 10mm, where the screen is 2m away from the slits. If wavelength of light used is 6000Å , then fringe width in 'mm' is<br/>
Question 29 :
Two coherent sources of intensities $I$ and $4I$ are superposed then $I_{bright} /I_{dark}$ is :   
Question 30 :
In Young's double slit experiment $62$ fringes are visible in the field of view with sodium light $(\lambda=5893A^o)$. If green light $(\lambda=5461A^o)$ is used then the number of visible fringes will be<br>
Question 31 :
For bright fringes, the path difference due to reflected light is must be equal to
Question 33 :
In a double-slit experiment, the distance between the two slits is $1mm$ and the screen is placed $1m$ away. What should be the width of each slit to obtain $20$ maxima of double slit pattern within the central maximum of the single slit pattern?
Question 34 :
Two slits in Young's experiment have widths in the ratio 1 : 25. The ratio of intensity at the maxima and minima in the interference pattern, $\displaystyle\frac{I_{max}}{I_{min}}$is<br>
Question 35 :
In the double slit experiment, the distance between two slits is $0.6mm$ and these are illuminated with light of wavelength $4800A^o$. The angular width of dark fringes on the screen distant $120cm$ from slits will be
Question 36 :
The refractive index of the medium, for the polarising angle $60^o$ is?
