Gives the definition of metre in terms of wavelength of red cadmium light ___________________?

Related Mcqs:

In a plane polarized light _________________?

A. vibration in all direction B. vibration in two mutually perpendicular directions C. vibration take place in a direction perpendicular to the direction of propagation of light D. no vibration at all...

Which one of the following cannot be polarized ?

A. radio waves B. ultraviolot rays C. X-rays D. sound waves...

The velocity of light was determined accurately by_______________?

A. Newton B. Michelson C. Huygen D. Young...

A light ray traveling form rarer to denser medium suffers a phase change of__________________?

A. 60° B. 90° C. 180° D. 45°...

Diffraction effect is____________________?

A. more for a round edge B. less for a round edge C. more for a sharp edge D. less for a sharp edge...