Discuss the diffraction produced by a narrow slit which is illuminated by a monochromatic light.

Why can we not get diffraction from a wide slit illuminated by a monochromatic light?

Draw the diffraction pattern due to a single slit by a monochromatic light.

Discuss the effects of light on plants

In a Young's double slit experiment,the slits are 1.5 mm apart.When the slits are illuminated by a monochromatic source and the screen is kept 1 m aprat from the slits,width of 10 fringes is measured as 3.93 mm.Calculate the wavelength of light used.What will be the width of 10 figes,when the distance between the slits and the screen is increased by 0.5 m?The source of light used remains the same.

Discuss the effect of light on animals.

What two main changes in diffraction pattern of a single slit will you observe,when the monochromatic source of light is replaced by a source of white light?

In Young.s experiment if two straight narrow parallel slits 3 mm (milimeter) apart are illuminated with monochromatic light of wavelength 5900 xx 10^(-8) cm (centimeter), Fringes are observed at adistance of 3m from slits. Fin the width of fringes?

Angular width of centrl maximum in the Fraunhofer diffraction pattern of a slit is measured.The slit is iluminated by igth of wavelength 6,000 overset@A .When the slit is illuminated by light of another wavelength,the angular width decreases y 30%.Calculate the wavelength of this light. The same decrease in the angular width of centrl maximum is obtained ,when the original appartus is immersed in a liquid.Fin refractive index of the liquid.