Wave Optics Set 4

A slit of width is illuminated by red light of wavelength If the first minimum falls at the value of is

To demonstrate the phenomenon of interference we require two sources which emit radiations of

In Young's double slit experiment, first slit has width four times the width of the second slit. The ratio of the maximum intensity to the minimum intensity in the interference fringe system is

and represent the velocities, and the refractive indices of ordinary and extraordinary rays for a doubly refracting crystal. Then

Consider the following statements about electromagnetic waves and choose the correct ones
S1 : Electromagnetic waves having wavelengths 1000 times smaller than light waves are called X-rays
S2 : Ultraviolet waves are used in the treatment of swollen joints
S3 : Alpha and gamma rays are not electromagnetic waves
S4 : de Broglie waves are not electromagnetic in nature
S5 : Electromagnetic waves exhibit polarization while sound waves do not
 

A Young's double slit experiment uses a monochromatic source. The shape of the interference fringes formed on a screen is

In a Fraunhofer diffraction experiment at a single slit using a light of wavelength 400 nm, the first minimum is formed at an angle of The direction of the first secondary maximum is given by

A wave is propagating in a medium of electric dielectric constant 2 and relative magnetic permeability 50. The wave impedance of such a medium is

If the intensities of the two interfering beams in Young's double alit experiment be and , then the contrast between the maximum and minimum intensity is good when

For what distance is ray optics a good approximation when the aperture is wide and the wavelength is