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Optics
if focal length of convex lens is f and it is cut into two equal part what is focal length of each part?
Optics
define 'phase' and 'phase difference'.
Optics
at an instant a watch shows time 2:35 when seen through a mirror,what time will be appeared?
Optics
a cardboard is placed between the screen and a source. how many holes should be there in cardboard so as to get uniform dark and bright bands on screen? name the phenomenon.
Optics
attach a infrared lens before the digital camera lens and take a snap.Is it a pure infra red image ?Is it possible to convert a normal camera to infrared cameras ?
Optics
If The magnification produced by a mirror is 1/3, what type of mirror is this?
Optics
A ray of light strikes a horizontal plane mirror at an angle of 45. At what angle should a second plane mirror be placed in order that the reflected ray finally be reflected horizontal?
Optics
calculate the wavelength of an electromagnetic wave of frequency o15MHz
Optics
what is the relation between refractive index and thickness of glass slab?
Optics
In a young's double slit experiment two disturbances arriving at a point have phase difference 60 degree. What would the& intensity be at this point if maximum intensity is I?
