HARD
12th West Bengal Board
IMPORTANT
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Light of wavelength 600 nm falls normally on a slit of width 1.2 μ m  producing Fraunhoffer diffraction pattern on a screen. Calculate the angular position of first minimum and the angular width of the central maximum.

Important Questions on Wave Optics

HARD
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 17 - Wave Optics>EXERCISE 17>Q 20
Light of wavelength 500 nm falls from a distant source, on a slit 0.50 mm wide. Find the distance between the two dark bands on either side of the central bright band of the diffraction pattern observed on a screen placed 2 m from the slit
EASY
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 17 - Wave Optics>EXERCISE 17>Q 21
At what angle of incidence should a light beam strike a glass slab of refractive index 3, such that reflected and refracted rays are perpendicular to each other.
MEDIUM
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 17 - Wave Optics>EXERCISE 17>Q 22
Calculate the distance a beam of light of wavelength 500 nm can travel without significant broadening if the diffraction aperture is 3 mm wide. 
MEDIUM
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 17 - Wave Optics>EXERCISE 17>Q 23
Two slits are made 1 mm apart and the screen is placed one metre away. What is the fringe separation when blue-green light of wavelength 500 nm is used. What should the width of each slit be to obtain 10 maxima of the double slit pattern within the central maximum of the single slit pattern.
EASY
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 17 - Wave Optics>EXERCISE 17>Q 24
A slit of width a is illuminated by a monochromatic light of wavelength 700 nm at normal incidence. Calculate the value of a for position of the first maximum at an angle of diffraction of 30°?
EASY
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 17 - Wave Optics>EXERCISE 17>Q 24
A slit of width a is illuminated by a monochromatic light of wavelength 700 nm at normal incidence. Calculate the value of a for position of the first minimum at an angle of diffraction of 30°?
MEDIUM
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 17 - Wave Optics>EXERCISE 17>Q 25
Two wavelengths of sodium light 590 nm and 596 nm are used, in turn, to study the diffraction taking place at a single slit of aperture 2×10-4 m.
The distance between the slit and the screen is 1.5 m. Calculate the separation between the positions of the first secondary maxima of the diffraction pattern obtained in the two cases.
 
MEDIUM
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 17 - Wave Optics>EXERCISE 17>Q 26
Calculate the resolving power of astronomical telescope, assuming the diameter of the objective lens to be 6 cm and wavelength of light used to be 540 mm.