Physics-
General
Easy
Question
A small object is placed 50 cm to the left of a thin convex lens of focal length 30 cm. A convex spherical mirror of radius of curvature 100 cm is placed to the right of the lens at a distance of 50 cm. The mirror is tilted such that the axis of the mirror is at an angle 
to the axis of the lens, as shown in the figure.
If the origin of the coordinate system is taken to be at the centre of the lens, the coordinates (in cm) of the point (x,y) at which the image is formed are
- (0, 0)
The correct answer is:
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Light guidance in an optical fiber can be understood by considering a structure comprising of thin solid glass cylinder of refractive index 
surrounded by a medium of lower refractive index 
. The light guidance in the structure takes place due to successive total internal reflections at the interface of the media and as shown in the figure. All rays with the angle of incidence i less than a particular value im are confined in the medium of refractive index . The numerical aperture (NA) of the structure is defined as sin im .
For two structures namely S1 with 
and 
and 
and taking the refractive index of water to be 4/3 and that of air to be 1, the correct option (s) is (are)
Light guidance in an optical fiber can be understood by considering a structure comprising of thin solid glass cylinder of refractive index surrounded by a medium of lower refractive index . The light guidance in the structure takes place due to successive total internal reflections at the interface of the media and as shown in the figure. All rays with the angle of incidence i less than a particular value im are confined in the medium of refractive index . The numerical aperture (NA) of the structure is defined as sin im .
For two structures namely S1 with and and and taking the refractive index of water to be 4/3 and that of air to be 1, the correct option (s) is (are)
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physics-General
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physics-General
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The complex ion has two optical isomers. Their correct configurations are:
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chemistry-General
chemistry-
Of the following configurations, the optical isomers are
I) 
II) 
III) 
IV) 
Of the following configurations, the optical isomers are
I)
II)
III)
IV)
chemistry-General
