Newest Optics Questions

*Image* In Young's double slit exper., slits are horizontal. The intensity at a point P shown in fig. is 3/4 I0, where I0, is the max. intensity. Then the value of \theta is, (Given the distance between the two slits S1 and S ...

Young's double slit experiment is performed in a liquid. The 10th bright fringe in liquid lies where 6th dark fringe lies in air. The refractive Index of the liquid is approximately, A) 1.2 B) 1.6 C) 1.5 D) 1.8 ...

Q1) A man of height 2h stands in the middle of the room of length 6h. The height of the wall is 4h. What is the minimum length of a mirror to be placed on the wall in front of him so that he can see the entire wall behind him ...

The wavelengths of k_{\alpha } and k_{\gamma } X- Rays are \lambda _{1} and \lambda _{2 } respectively. The wavelength of L _{\beta } X- Rays is A) \frac{\lambda _{1 } + \lambda _{2}}{2} B) \frac{\mid \lambda _{1 } - \lambda ...

A lens is placed between a source of light and wall. It forms images of area a1 and a2 on the wall for two positions. The area of source is A) \frac{\sqrt{a_{1}a_{2}}}{2} B) \frac{a_{1}a_{2}}{a_{1}+a_{2}} C) \sqrt{a_{1}a_{2}} ...

A converging and a diverging lens of equal focal lengths are placed co-axially in contact find the power and the focal length of the combination. ...

A lens of focal length 15 cm is dipped in water. What is the new focal length given that ref index of glass wrt air is 3/2 and that of water wrt air is 4/3. If the lens is dipped in a liquid under what condition, the rays are ...

(In a double slit expriment, the two cohunt beams have slightly different intensities I and I + lI (lI << I). Show that the resultant intersity at the maxima is nearly 4I while that at minima is (dI)^2/4I ...

how to find the no. of maximas in the screen if the wavelength is given? ...

Monochromatic light of wavelength 400 nm and 560 nm are incident simultaneously and normally on double slits apparatus whose slits separation is 0.1 mm and screen distance is 1m.Distance between areas of total darkness will b ...

In youngs double slit experiment the distance between slits is d. The distance between slits and screen is a. With help of wavelength L no. of fringes observed per metre on screen will be?????? ...

(IIT 1984 - Multi ans correct) White light is used to illuminate the 2 slits in a Young's double slit experiment.The separation between the slits is b and the screen is at a distance d(>b) from the slits.At a point on the ...

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1.someone please help me out on this type of Q: when one side of a convex lens (of some given radius of curvature) is silvered and the object distance, refractive index of glass of lens is given. And we have to find the image ...

If the wavelength of incident light on a)concave mirror and b) convex lens is increased, how will the focal length of each of these change.Give reason. ...

which is the best sign convention in optics? ...

ncert class XII page 316....chapter 9 example 9.4 havin a doubt in this example.....when i solve it by differentiating th mirror equation wrt time....m getting an answer different from the achieved by the method shown here... ...

A bird in air is diving veritcally over a tank with speed 5 cm/s. Base of tank is silvered. A fish in the tank is rising upward along the same line with speed 2 cm/s. Water level is falling at a rate of 2 cm/s.{n of wter is 4 ...

If two plane mirrors are placed perpendicular to each other , if a ray of light falls at an angle "a " with the plane of one mirror. Find the value of "a" so that reflected ray becomes parallel after reflection from second mi ...

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A plane mirror is placed 25cm away frm a spherical concave mirror (R=40cm) perpendicularly to the principal axis of the concave mirror. Where is a candle placed, if its images formed by the two mirrors independently are at th ...

*Image* a parralle of beam of light falls on the quater of the cirlce of radius R as shown n the figure.RI of the quater of the cilcle is 3 nd of the surrouding medium is 1 . maximum value of OP as show in the figure so that ...

one face of an equiconvex lens of focal length 60 cm made of glass (μ=1.5) is silvered......does it behav lik a concave or covex mirror.....find effectiv f ...

a person is in a room whose ceeiling and two adjacent walls r mirrors.....how many images r formed ...

An object is placed in front of a concave mirror of focal length 'f' as in figure find the size of image and its postion. *Image* The actual dbt is abt paraxial rays.We assumed this for our entire optics chapter,Well how is u ...

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The state of polarization of light with electric field vector \bar{E}=\hat{i}E_0cos(kz-\omega t)-\hat{j}E_0cos(kz-\omega t) is a)linearly polarized along Z axis b)linearly polarized at 45° to X axis c)circularly polarized d) ...

When a ray of light is passed through calcite crystal,it splits up into _____ refracted rays ...

Why do Light waves projected on oil surface show seven colors ? ...

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