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.

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 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.
MEDIUM
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 17 - Wave Optics>EXERCISE 17>Q 4
A beam of light consisting of two wavelengths 600 nm and 500 nm is used to obtain fringes in a Young's double slit experiment. Separation between the slits is 2 mm and the screen is placed 120 cm away from the slits. Find the least distance from the central bright fringe where the bright fringe due to both the wavelength coincide. 
EASY
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 17 - Wave Optics>EXERCISE 17>Q 5
Laser light of wavelength 640 nm incident on pair of slits produces an interference pattern in which the bright fringes are separated by 7.2 mm. Calculate the wavelength of another source of light which produces interference fringes separated by 8.1 mm using the same arrangement.