Recently Active Optics Questions

Two plane mirrors A and B are aligned parallel to each other, as shown in the figure. A light ray is incident at an angle of 30o at a point just inside one end of A. The plane of incidence coincides with the plane of the figu ...

Parallel rays fall perpendicularly on a surface of a solid sphere of glass. The radius of the sphere is 5cm and refractive index of glass is 1.5. Where will the rays meet ? ...

A vertical pencil of rays comes from the bottom of a tank filled with a liquid.When it is accelerated with an acceleration of 7.5 m/s2 , the ray is seen to be totally reflected by liquid surface.What is the minimum possible r ...

Some converging light rays fall on a convex mirror of focal length of 30 cm. In absence of the mirror the rays could meet at distance of 20 cm from the pole of the mirror. Where do the rays meet in presence of the mirror? ...

A point object is moving on principal axis of a fixed spherical mirror.As the point object approaches the focus is it necessary that the image moves away from the focus?? Is it correct that product of magnitude of object dist ...

Hi all, get relevant and useful flash animations in physics at http://www.mksfoundation.com/flashlets.aspx and lot of other free stuff for JEE preparation at this site. ...

2) find the position coordinates of the image of the object *Image* P as seen through the periscope. The mirrors are inclined at 45 degrees with the x-axis and eye is placed at the level y = -d . answer (3d,-d) ...

*Image* Ans : A,C plz help me out with this problem. ...

In Lens Makers Formula Should we substitute the value of u (object distance) & v (Image distance) with proper Sign or just the value Lens Makers Formula : 1/v - 1/u = ( \mu_{2} / \mu_{1} )( 1/R1 - 1/R2 ) ...

Two mirrors at an angle θº produce 5 images of a point. The number of images produced when θ is decreased to θº – 30º is (A) 9 (B) 10 (C) 11 (D) 12 ...

A pole of height 4m is kept in front of a vertical plane mirror of length 2 m . The lower end of the mirror is at a height of 6m from the ground. The horizontal distance between the mirror and the pole is 2 m . Upto what mini ...

Q.1. A man uses a concave mirror for shaving.He keeps his face at a distance of 25 cm from the mirror and gets an image which is 1.4 times enlarged.Find the focal length of the mirror. Q.2.Find the diameter of the image of th ...

Have i gone crazy or has the kvpy ones gone question A concave lens of focal length 20 cm is given. A point object is at 10 m toward sleft of it .Find its image. Official solution since the image is at 2f the image is also fo ...

two plane mirrors are at angle 30degrees with each other.If an ray is incident on upper mirror with angle of incidence 50degrees then find angle of deviation after 3 succesive reflection.Please explain with diagram ...

Q1. Light is incident from glass to water.Find the range of the angle of deviation for which there are two angles of incidence. n(water) =4/3 . n(glass)=3/2 . Q2. An object P is focussed by a microscope M. A glass slab of thi ...

hi is it true that for light waves power ∞ Intensity (only) ?? i mean can we write P = P1 + P2 + √(P1P2) cos (phase deference in terms of angle) ?????????? ????????? ???????? ??????? ?????? ????? ???? ??? ?? ? ...

In the following figure, the space b/w the glass lenses is filled with water. We have to find the focal length of the system (radii of curvature, refractive indices given) *Image* Now to calculate the focal length of the wate ...

1. A bulb is placed at a depth of 2 7 m in water and a floating opaque disc is placed over the bulb so that the bulb is not visible from the surface. What is the minimum diameter of the disc? 2. A fish rising vertically to th ...

ok got it cleared myself! ...

A plano-convex lens has a thickness of 4 cm. When placed on a horiz. table , with the curved surface in contact with it , the apparent depth of the bottom most pt. of the lens is found to be 3 cm. If the lens is inverted such ...

A slab of glass of refractive index is surrounded by vacuum and is placed as shown. A light ray is incident at the point (2, 5 ) as shown. The point where the ray will cut the x axis is: ...

A circular disc of diameter d lies horizontally inside a metallic hemispherical bowl of radius 'a'. The disc is just visible to an eye looking over the edge. The bowl is now filled with a liquid of refractive index u. Now the ...

hey...anyone can help me out from these questions..pllzzz Q1. A cylindrical vessel, whose diameter and height both are equal to 30 cm, is placed on horizontal surface and a small particle P is placed in it at a distance of 5 ...

In the arrangement shown wavelength of light used is \lambda . The distance b/w slits S1 and S2 is d ( <<D) . The distance b/w S3 and S4 is u = \lambda D / 3d . If the ratio of max to min intensity observed on screen is ...

q: Sodium light has 2 wavelengths; lambda1=589nm and lambda2=589.6nm.As the path difference inc, when is the visibility of the fringes maximum?? Ans- 0.29mm.. if i find a position where bright fringes of both will coincide ot ...

Q5. A ray of sunlight enters a spherical water droplet (refractiv index = 4/3) at an angle of incidence 53° measured with respect to the normal to the surface. It is reflected from the back surface of the droplet and re-ente ...

Q.How would the diffraction pattern of a single slit be affected when: the width of the slit is decreased? ans: the diffraction pattern becomes narrower shudn't it become wider?[lamda/a formula..] [my friend sent me this ques ...

ignore ...

Is the power of convex mirror positive or negative? Pretty easy question to ask but my book says it is negative as opposed to positive. I hope the book is wrong. Is there any other sign convention for powers of mirrors? ...

In a YDSE experiment, the distance between the slits & the screen is 100 cm. For a certain distance between the slits, an interference pattern is observed on the screen with the fringe width 0.25 mm. When the distance between ...