Light reaches the earth form sun in nearly____________________?

Related Mcqs:

The blue colour of the sky is due to___________________?

A. diffraction B. reflection C. polarization D. scattering...

Wavelength of X-rays falling at glancing angle of 30? on a crystal with atmic spacing 2 x 10-10 for the fist order diffraction is________________?

A. 4 x 10-10 m B. 2 x 10-10 m C. 0.02×10-10m D. 20×10-10m...

Which one of the following cannot be polarized ?

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

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...

A diffraction grating has 500 lines per mm. Its slit spacing or grating element will be equal to ____________________?

A. 500 mm B. 5 x 10-3 mm C. 2 x 10-5 mm D. 2 x 10-3 mm...