Wave Optics Tes...

Wavefront means

The ozone layer absorbs 

The range of wavelength of the visible light is 

Huygen's principle of secondary wavelets may be used to

In a Young's double slit experiment $$62$$ fringes are seen in visible region  for sodium light of wavelength $$5893\overset{o}{A}$$. If violet light of wavelength $$4358\overset{o}{A}$$ is used in plane of sodium light, then number of fringes seen will be

The wave theory of light was given by

In two separate set ups of the Young's double slit experiment, fringes of equal width are observed when lights of wavelength in the ratio $$1:2$$ are used. If the ratio of the slit separation in the two cases is of the distance between the plane of the slits and the screen in the two set ups is

What is ozone hole 

Which radiation in sunlight, causes heating effect 

Select the right option in the following