Visible spectrum of light lies between :
Visible spectrum lies between:
Colour with the shortest wave length is :
Intensity of a colour of light is determined by its
A ray of light is incident on a plane mirror at an angle of 30 degree.The deviation produced by the mirror is
Two plane mirrors are placed perpendicular to each other.The ray strikes the first mirror and and falls on the second mirror and is reflected .The emergent ray is;
An object is initially at a distance of 100 cms from a plane morror.If the mirror approaches the object at a speed of
5 cms /sec , after 6 secs the distance between the object and the image is;
It is desirednto photograph the image of an object placed at a distance of 3 m from a plane mirror by a camera which is placed at a distance of 4.5 m from the mirror. at what distance the camera must be focussed.
Two plane mirrors are placed at an angle
such that a ray incident parallel to the first mirror after successive
reflections from the two mirrors goes parallel to the second mirror.The number of images that can be seen is;
A real inverted image of the same size as the object is obtained by