A diffraction grating has 500 lines per mm. Its slit spacing or grating element will be equal to ____________________?
Diffraction effect is____________________?
A light ray traveling form rarer to denser medium suffers a phase change of__________________?
appearance of colour in thin films is due to ____________________?
The velocity of light was determined accurately by_______________?
Two sources of light are coherent if they emit rays of_______________?
The locus of all points in a medium having the same phase of vibration is called____________________?
Central spot of Newtons rings __________________?
According to Einstein light travels form one place to another in the form of ________________?
Light reaches the earth form sun in nearly____________________?
