HARD
12th West Bengal Board
IMPORTANT
Earn 100

 Show that the angular width of the first diffraction fringe is half that of central fringe.

Important Questions on Wave Optics

EASY
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 17 - Wave Optics>EXERCISE 17>Q 13

 If monochromatic source of light is replaced by white light, what change would you observe in the diffraction pattern.

EASY
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 17 - Wave Optics>EXERCISE 17>Q 14
How does an unpolarised light incident on a polaroid get polarised ? Describe briefly, with the help of a necessary diagram, the polarisation of light by reflection from a transparent medium.
MEDIUM
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 17 - Wave Optics>EXERCISE 17>Q 15
Explain briefly, giving a suitable diagram, how an unpolarised light incident on the interface separating two transparent media gets polarised on reflection. Deduce the necessary condition for it. 
MEDIUM
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 17 - Wave Optics>EXERCISE 17>Q 1
Wavelength of a certain colour in vacuum is 500 nm Determine the speed, wavelength and frequency of that light in flint glass. Given: speed of light in vacuum =3×108 m/s and refractive index of the flint glass is 1.66.
MEDIUM
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 17 - Wave Optics>EXERCISE 17>Q 2
In a Young's double slit experiment, separation between the two slits is 0.3 mm distance between the screen and the slits is 1.2 m. Distance of the second bright fringe from the central bright fringe on the screen is 4.5 mm. Find the wavelength of the light used in the experiment.
EASY
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 17 - Wave Optics>EXERCISE 17>Q 2
In a Young's double slit experiment, separation between the two slits is 0.3 mm; distance between the screen and the slits is 1.2 m. Distance of the second bright fringe from the central bright fringe on the screen is 4.5 mm. Find the fringe width.
EASY
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 17 - Wave Optics>EXERCISE 17>Q 3
In a Young's double slit experiment, if monochromatic light of wavelength 600 nm be used, the fringe width becomes  3 mm. What will be the fringe width if  wavelength of the light used be 500 nm 
EASY
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 17 - Wave Optics>EXERCISE 17>Q 3
In a Young's double slit experiment, if monochromatic light of wavelength 600 nm be used, the fringe width becomes 3 mm. What will be the fringe width if the whole experimental arrangement be immersed in water of r.i. 43.