Recently Active Optics Questions

• a ray of light is incident on concave mirror . it is parallel to principal axis and its height from principal axis is equal to focal length of mirror. the ratio of distance of point B to distance of the focus from centre of c ...
replied2019-01-08 23:04:58
• A thin convex lens whose focal length in air is known to be 30cm is cut into two parts by a transverse plane parallel to principal axis and 0.5cm above the principal axis. They are placed on the x-axis a shown in the figure.A ...
replied2018-10-02 09:10:25
• Light of wavelength 4000 Ao is incident at small angle on a prism of apex angle 4o The prism has nv = 1.5 & nr = 1.48. The angle of dispersion produced by the prism in this light is ? A)0.2o B) 0.08o C)0.192o D)None of these ...
replied2018-08-24 20:25:34
• The fig. shows a silvered lens . ref. index of a = 1.6 and ref. index of b= 1.2 , R1 = 80 cm , R2 = 40 cm and R3 = 20 cm. An object is placed at a distance of 12 cm frm this lens. Find the image posn. http://img835.imageshack ...
replied2018-02-23 13:15:20
• A mark placed on the surface of a glass sphere is viewed through a glass prism form an oppositely directed position. If the diameter of the glass sphere is 20 cm, find the position of image if refractive index of glass is 1.5 ...
replied2017-05-27 09:35:07
• 2 mirrors are inclined at an angle Î¸ as shown in figure.Light ray is incident parallel to one mirror.The ray will start retracing its path after the third collision if: a)Î¸=45Â° b)Î¸=30Â° c)Î¸=60Â° d)all three *Image* ...
replied2016-08-18 19:42:18
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replied2014-03-20 11:09:18
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replied2014-03-10 04:58:26
• *Image* A solid iron sphere of radius=1m is just submerged in a water tank. A point source of light is kept vertically above its center at a distance 1m from the water surface. Find the area of the sphere's shadow. Refractive ...
replied2014-03-07 21:48:44
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replied2014-02-25 09:58:04
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replied2014-02-22 20:00:49
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replied2014-02-22 03:41:06
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replied2014-01-26 07:51:44
• Two thin convex lenses of focal lengths f1 and f2 are separated by a horizontal distance 'd' ( where f1 and f2 are greater than 'd') and their centres are displaced by a vertical separation 'Î´'...Taking the origin of co-ordi ...
replied2013-11-25 04:37:50
• A point source 'S' is placed at a height 'h' from the bottom of a vessel of height 'H'(where h is greater than H)..The vessel is polished at the base ..Water is gradually filled in the vessel at a constant rate of Î± m3/s. Th ...
replied2013-11-25 04:37:29
• Consider a usual set-up of Young's Double Slit Experiment with slits of equal intensity. Take 'O' as origin and Y-axis as the screen..If the average intensity between y1 = -(Î».D)/(4d) and y2 = +(Î».D)/(4d) equals 'n' times t ...
replied2013-11-25 04:36:49
• A thin slice is cut out of glass cylinder along a plane parallel to its axis ..The slice is placed on a flat plate (just as a bowl is placed on a table)..the observed interference fringes from this combination shall be??????? ...