Recently Active Optics Questions

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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A disc of diameter 7 cm is placed inside a hemispherical bowl of 25 cm. What should be the refractive index of water such that the disc is completely visible on filling it with water? ...

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

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) ...

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

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The dotted part of the lens is cut & kept along the x-axis as shown. *Image* If parallel paraxial rays fall on this system, the coordinate of the image formed after refraction from both the lenses is (30,-1). If a=2.5 cm, Fin ...

may be easy *Image* ...

1 a parallel beam of light falls on a quarter cylinder of radius R as shown in fig. (A) μ= 3 . max. value of OP as shown in fig. (B) ,so that rays do not suffer total internal reflection at the curved surface is *Image* 2.ri ...

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Column-I gives certain situations regarding a point object and its image formed by an optical instrument. Consider direction of incident ray as positive x-direction. The possible optical instruments are concave and convex mir ...

Ques 1) A boy of height 1.5 m with the eye level at 1.4 m stands before a plane mirror of length 0.75 m fixed on the wall. The height of the lower edge of the mirror above the floor is 0.8 m. Then :- (a) the boy will see his ...

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Does wavelength of light depend on temperature? Just asking coz if it would depend then fringe width should also depend on temperature... ??? ...

Let S1 and S2 be two slits in Young's doubles SLit expt. If the central maxima is observed at P and angle S1PS2 = θ ( θ is small).Find the y coordinates of the 3rd minima assuming the origin to be at the central maxima. λ ...

2 coherent point light sources are placed at x=\pm \frac{d}{2} . These sources are surrounded by a spherical screen having eqn x^2+y^2+z^2=R^2 . Given R>>d, sources emit monochromatic light of wavelength \lambda=\frac{d ...

An ray of light is incident with grazing angle at (0,0) The refractive index of the medium (in grey) varies with x-coordinate as N=2x. What is the path of the light ray? *Image* ...

A tube of length 30 cm has its inner lateral surface blackened.Two lenses of focal length 10 cm and 20 cm are fixed at the end of the tube.for the same beam intencities on the screen are I1 and I2 for arrangement 1 and 2 resp ...

One of my old doubts ; still unsolved.... *Image* (P.S. I don't have the answer) ...

For the first time i have seen an image which explains the formula 360/theta so nicely.. have a look.. *Image* ...

*Image* WAT WILL B D SPEED OF D IMG? SPEED OF OBJT IS Vm =3m/s SPEED OF plane MIRROR IS Vo=2m/s ...

A ray of light is incident at a small angle "i" on a surface of a prism of small angle "A" & emerges normally frm the opposite face. If the refractive index of the prism material is "n", the angle of incidence "i" is nearly e ...

If c is positive and 2ax^2 + 3bx +5c=0, does not have any real roots, then prove that 2a-3b+5c>0. ...

If the is in one medium and the observer in other medium both media being at rest, the time taken to travel from one to the other is fixed for all points of the wavefronts. This means that two wavefronts separated by one time ...

STATEMENT-1 : When oil spread over water or soap bubbles are seen in sunlight, brilliant colours are seen due to interference of light. and STATEMENT-2 : The conditions for constructive and destructive interference in thin fi ...

Ques) Two plane mirrors each 1.6 m long, are facing each other. The distance b/w the mirrors is 20 cm. A light incident on one end of one of the mirrors at an angle of incidence of 30 °. How many times is the ray reflected b ...

Paragraph for Question When we see the bottom of a vessel filled with liquid using paraxial rays then the bottom appears to be raised by a distance where t is the real depth and is the refractive index of liquid. On the contr ...