Wave Optics Tes...

The phenomenon of rotation of plane polarized light is called:

Which of  the following gives the  basis for the observation that the universe is expanding?

A student wants to find if a star if moving away from the earth or towards the earth. Which of the following principle he can use? 

In Young's double slit experiment a minima is observed when path difference between the interfering beam is

Which of the following statement is false:

The light beams of intensities in the ratio of $$9:1$$ are allowed to interfere. What will be the ratio of the intensities of maxima and minima?

In Young's double slit experiment if the slit width is in the ratio $$ 1: 9$$. The ratio of the intensity at minima to that at maximum will be 

Astronomers can tell whether a star is approaching or receding from the earth . Identify by which of the following method they can predict this ?

Red light passes through two narrow vertical slits so that a diffraction pattern is formed on a screen.
Which of the following looks most like the expected diffraction pattern?

The size of corpuscles are ________ for different colours.