Physics
Young’s double slit experiment is first performed in air and then in a medium other than air. It is found that 8th bright fringe in the medium lies where 5th dark fringe lies in air. The refractive index of the medium is nearly
21
Aug
Young’s double slit experiment is first performed in air and then in a medium other than air. It is found that 8th bright fringe in the medium lies where 5th dark fringe lies in air. The refractive index of the medium is nearly In a diffraction pattern due to a single slit of width a [...]
Angular width of central maxima in the Fraunhoffer diffraction pattern of a slit is measured. The slit is illuminated by light of wavelength 6000Å. When the slit is illuminated by light of another wavelength, the angular width decreases by 30%. The wavelength of this light will be
20
Aug
Angular width of central maxima in the Fraunhoffer diffraction pattern of a slit is measured. The slit is illuminated by light of wavelength 6000Å. When the slit is illuminated by light of another wavelength, the angular width decreases by 30%. The wavelength of this light will be In a diffraction pattern due to a single [...]
A beam of light of wavelength 600 nm from a distant source falls on a single slit 1.0 mm wide and the resulting diffraction pattern is observed on a screen 2m away. What is the distance between the first dark fringe on either side of the central bright fringe?
20
Aug
A beam of light of wavelength 600 nm from a distant source falls on a single slit 1.0 mm wide and the resulting diffraction pattern is observed on a screen 2m away. What is the distance between the first dark fringe on either side of the central bright fringe? In a diffraction pattern due to [...]
At the first minimum adjacent to the central maximum of a single-slit diffraction pattern the phase difference between the Huygens wavelet from the edge of the slit and the wavelet from the mid-point of the slit is
20
Aug
At the first minimum adjacent to the central maximum of a single-slit diffraction pattern the phase difference between the Huygens wavelet from the edge of the slit and the wavelet from the mid-point of the slit is In a diffraction pattern due to a single slit of width a the first minimum is observed at [...]
For a parallel beam of monochromatic light of wavelength ′λ′, diffraction is produced by a single slit whose width ‘a’ is of the order of the wavelength of the light. If ‘D’ is the distance of the screen from the slit, the width of the central maxima will be
20
Aug
For a parallel beam of monochromatic light of wavelength ′λ′, diffraction is produced by a single slit whose width ‘a’ is of the order of the wavelength of the light. If ‘D’ is the distance of the screen from the slit, the width of the central maxima will be diffraction is produced by a single [...]
A linear aperture whose width is 0.02 cm is placed immediately in front of a lens of focal length 60 cm. The aperture is illuminated normally by a parallel beam of wavelength 5×10^−5 cm. The distance of the first dark band of the diffraction pattern from the centre of the screen is
20
Aug
A linear aperture whose width is 0.02 cm is placed immediately in front of a lens of focal length 60 cm. The aperture is illuminated normally by a parallel beam of wavelength 5×10^−5 cm. The distance of the first dark band of the diffraction pattern from the centre of the screen is In a diffraction [...]
In a diffraction pattern due to a single slit of width a, the first minimum is observed at an angle 30 degree∘ when light of wavelength 5000 Å is incident on the slit. The first secondary minimum is observed at an angle of
20
Aug
In a diffraction pattern due to a single slit of width a, the first minimum is observed at an angle 30 degree∘ when light of wavelength 5000 Å is incident on the slit. The first secondary minimum is observed at an angle of In a diffraction pattern due to a single slit of width a [...]
The angular resolution of a 10 cm diameter telescope at a wavelength of 5000 A is of the order of
20
Aug
The angular resolution of a 10 cm diameter telescope at a wavelength of 5000 A is of the order of The angular resolution of a 10 cm diameter telescope at a wavelength of 5000 A is of the order of August 20, 2020 Category: Chapter 32 - Ray Optics , NEET Last 32 Years Solved [...]
The magnifying power of a telescope is 9. When it is adjusted for parallel rays, the distance between the objective and the eye piece is found to be 20 cm. The focal length of lenses are
20
Aug
The magnifying power of a telescope is 9. When it is adjusted for parallel rays, the distance between the objective and the eye piece is found to be 20 cm. The focal length of lenses are the distance between the objective and the eye piece is found to be 20 cm. The focal length of [...]
For a normal eye, The cornea of eye provides a converging power of 40 D and the least converging power of the eye lens behind the cornea is 20 D. Using this information, the distance between the retina and the cornea eye lens can be estimated to be
20
Aug
For a normal eye, The cornea of eye provides a converging power of 40 D and the least converging power of the eye lens behind the cornea is 20 D. Using this information, the distance between the retina and the cornea eye lens can be estimated to be For a normal eye The cornea of [...]