The refractive index of four substances A, B, C and D are 1.31, 1.43, 1.33, 2.4
respectively. The speed of light is maximum in
If V B , V G , VR be the velocity of blue, green and red light respectively in a glass prism,
then which of the following statement gives the correct relation?
Magnification of a convex lens is
Which of the following lens would you prefer to use while reading small letters found
in a dictionary?
A small bulb is placed at the principal focus of a convex lens. When the bulb is
switched on, the lens will produce
In a myopic eye, the image of the object is formed
A convex lens forms a real, diminished point sized image at focus. Then the position
of the object is at
The eye defect ‘presbyopia’ can be corrected by
Where should an object be placed so that a real and inverted image of same size is
obtained by a convex lens
Power of a lens is –4D, then its focal length is