Chapter 27 – Wave Optics
In the ideal double-slit experiment, when a glass plate (refractive index 1.5) of thickness t is introduced in the path of one of the interfering beams (wavelength λ), the intensity at the position where the central maximum occurred previously remains unchanged. The minimum thickness of the glass plate is
15
Nov
In the ideal double-slit experiment, when a glass plate (refractive index 1.5) of thickness t is introduced in the path of one of the interfering beams (wavelength λ), the intensity at the position where the central maximum occurred previously remains unchanged. The minimum thickness of the glass plate is In the ideal double-slit experiment the [...]
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In the ideal double-slit experiment ,
the intensity at the position where the central maximum occurred previously remains unchanged. The minimum thickness of the glass-plate is ,
when a glass-plate (refractive index 1.5) of thickness t is introduced in the path of one of the interfering beams (wavelength λ) ,
In Young’s double-slit experiment, 12 fringes are observed to be formed in a certain segment of the screen when light of wavelength 600 nm is used. If the wavelength of light is changed to 400 nm, number of fringes observed in the same segment of the screen is given by
15
Nov
In Young’s double-slit experiment, 12 fringes are observed to be formed in a certain segment of the screen when light of wavelength 600 nm is used. If the wavelength of light is changed to 400 nm, number of fringes observed in the same segment of the screen is given by 12 fringes are observed to [...]
Two beam of light having intensities I and 4I interfere to produce a fringe pattern on a screen. The phase difference between the beams is π/2 at point A and π at point B. Then the difference between resultant intensities at A and B is
15
Nov
Two beam of light having intensities I and 4I interfere to produce a fringe pattern on a screen. The phase difference between the beams is π/2 at point A and π at point B. Then the difference between resultant intensities at A and B is What happens to the interference pattern if the two slits [...]
A parallel beam of white light is incident on a thin film of air of uniform thickness. Wavelength 7200Å and 5400Å are observed to be missing from the spectrum of reflected light viewed normally. The other wavelength in the visible region missing in the reflected spectrum is
15
Nov
A parallel beam of white light is incident on a thin film of air of uniform thickness. Wavelength 7200Å and 5400Å are observed to be missing from the spectrum of reflected light viewed normally. The other wavelength in the visible region missing in the reflected spectrum is What happens to the interference pattern if the [...]
In double-slit experiment, the slits are separated by a distance d and the screen is at a distance D from the slits. If a maximum is formed just opposite to each slit, then what is the order of the fringe so formed?
15
Nov
In double-slit experiment, the slits are separated by a distance d and the screen is at a distance D from the slits. If a maximum is formed just opposite to each slit, then what is the order of the fringe so formed? In double-slit experiment the slits are separated by a distance d and the [...]
Microwaves from a transmitter are directed toward a plane reflector. A detector moves along the normal to the reflector. Between positions of 14 m successive maxima the detector travels a distance 0.14 m. What is the frequency of the transmitter ?
15
Nov
Microwaves from a transmitter are directed toward a plane reflector. A detector moves along the normal to the reflector. Between positions of 14 m successive maxima the detector travels a distance 0.14 m. What is the frequency of the transmitter ? What happens to the interference pattern if the two slits in Young's experiment are [...]
In a Young’s doubleslit experiment, first maxima is observed at a fixed point P on the screen. Now, the screen is continuously moved away from the plane of slits. The ratio of intensity at point P to the intensity at point O (centre of the screen)
15
Nov
In a Young’s doubleslit experiment, first maxima is observed at a fixed point P on the screen. Now, the screen is continuously moved away from the plane of slits. The ratio of intensity at point P to the intensity at point O (centre of the screen) first maxima is observed at a fixed point P [...]
A Young’s double slit experiment is conducted in water (μ 1 ) as shown in the figure, and a glass plate of thickness t and refractive index μ 2 is placed in the path of S 2. The magnitude of the phase difference at O is : (Assume that′ λ ′ is the wavelength of light in air)
15
Nov
A Young’s double slit experiment is conducted in water (μ 1 ) as shown in the figure, and a glass plate of thickness t and refractive index μ 2 is placed in the path of S 2. The magnitude of the phase difference at O is : (Assume that′ λ ′ is the wavelength of [...]
In a two slit experiment with white light, a white fringe is observed on a screen kept behind the slits. When the screen is moved away by 0.05 m, this white fringe
15
Nov
In a two slit experiment with white light, a white fringe is observed on a screen kept behind the slits. When the screen is moved away by 0.05 m, this white fringe a white fringe is observed on a screen kept behind the slits. When the screen is moved away by 0.05 m In a [...]
Let S^1 and S^2 be the two slits in Young’s double-slit experiment. If central maxima is observed at P and angle ∠S1PS 2 =θ, then the fringe width for the light of wavelength λ will be (assume θ to be a small angle)
15
Nov
Let S^1 and S^2 be the two slits in Young’s double-slit experiment. If central maxima is observed at P and angle ∠S1PS 2 =θ, then the fringe width for the light of wavelength λ will be (assume θ to be a small angle) Let S^1 and S^2 be the two slits in Young's double-slit experiment. [...]