Chapter 32 – Ray Optics
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When a certain metallic surface is illuminated with monochromatic light of wavelength λ. The stopping potential for photoelectric current is 3V0 and when the same surface is illuminated with light of wavelength 2λ, the stopping potential is V0. The threshold wavelength of this surface for photoelectric effect is
21
Aug
When a certain metallic surface is illuminated with monochromatic light of wavelength λ. The stopping potential for photoelectric current is 3V0 and when the same surface is illuminated with light of wavelength 2λ, the stopping potential is V0. The threshold wavelength of this surface for photoelectric effect is Pick the wrong answer in the context [...]
Light with an energy flux of 25 × 10^4 Wm^−2 falls on a perfectly reflecting surface at normal incidence. If the surface area is 15cm2, the average force exerted on the surface is
21
Aug
Light with an energy flux of 25 × 10^4 Wm^−2 falls on a perfectly reflecting surface at normal incidence. If the surface area is 15cm2, the average force exerted on the surface is Light with an energy flux of 25 × 10^4 Wm^−2 falls on a perfectly reflecting surface at normal incidence. If the surface [...]
The Young’s modulus of steel is twice that of brass. Two wires of sample length and of same area of cross section, one of steel and another of brass are suspended from the same roof. If we want the lower ends of the wires to be at the same level, then the weights added to the steel and brass wires must be in the ratio of
21
Aug
The Young’s modulus of steel is twice that of brass. Two wires of sample length and of same area of cross section, one of steel and another of brass are suspended from the same roof. If we want the lower ends of the wires to be at the same level, then the weights added to [...]
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one of steel and another of brass are suspended from the same roof. If we want the lower ends of the wires to be at the same level ,
The Young's modulus of steel is twice that of brass. Two wires of sample length and of same area of cross section ,
then the weights added to the steel and brass wires must be in the ratio of ,
Pick the wrong answer in the context with rainbow.
21
Aug
Pick the wrong answer in the context with rainbow. Pick the wrong answer in the context with rainbow. August 21, 2020 Category: Chapter 32 - Ray Optics , NEET Last 32 Years Solved 1988 - 2019 Physics and Chemistry Video Solutions , Physics ,
Unpolarised light is incident from air on a plane surface of a material of refractive index ′μ′. At a particular angle of incidence ′I′ , it is found that then reflected and refracted rays are perpendicular to each other. Which of the following options is correct for this situation?
21
Aug
Unpolarised light is incident from air on a plane surface of a material of refractive index ′μ′. At a particular angle of incidence ′I′ , it is found that then reflected and refracted rays are perpendicular to each other. Which of the following options is correct for this situation? it is found that then reflected [...]
Match the corresponding entries of column 1 with column 2. (where m is the magnification produced by the mirror)
21
Aug
Match the corresponding entries of column 1 with column 2. (where m is the magnification produced by the mirror) Match the corresponding entries of column 1 with column 2. (where m is the magnification produced by the mirror) August 21, 2020 Category: Chapter 32 - Ray Optics , NEET Last 32 Years Solved 1988 - [...]
Two Polaroids P1 and P2 are placed with their axis perpeTwo Polaroids P1 and P2 are placed with their axis perpendicular to each other. Unpolarised light I0 is incident on P1. A third polaroid P3 is kept in between P1 and P2 such that its axis makes an angle 45 degree with that of P1. The intensity of transmitted light through P2 isndicular to eachother. Unpolarised light I0 is nicident on P1. A third polaroid P3 is kept in between P1 and P2 such that its axis makes an angle 45 degree with that of P1. The intensity of transmitted light through P2 is
21
Aug
Two Polaroids P1 and P2 are placed with their axis perpeTwo Polaroids P1 and P2 are placed with their axis perpendicular to each other. Unpolarised light I0 is incident on P1. A third polaroid P3 is kept in between P1 and P2 such that its axis makes an angle 45 degree with that of P1. [...]
In Young’s double slit experiment, the slits are 2 mm apart and are illuminated by photons of two wavelengths λ1 = 12000 A and λ2 = 10000 A. At what minimum distance from the common central bright fringe on the screen 2 m from the slit will a bright fringe from one interference pattern coincide with a bright fringe from the other?
21
Aug
In Young’s double slit experiment, the slits are 2 mm apart and are illuminated by photons of two wavelengths λ1 = 12000 A and λ2 = 10000 A. At what minimum distance from the common central bright fringe on the screen 2 m from the slit will a bright fringe from one interference pattern coincide [...]
In a double slit experiment, when light of wavelength 400 nm was used, the angular width of the first minima formed on a screen placed 1m away, was found to be 0.2 degree. What will be the angular width of the first minima, if the entire experimental apparatus is immersed in water ? (μwater=4/3)
21
Aug
In a double slit experiment, when light of wavelength 400 nm was used, the angular width of the first minima formed on a screen placed 1m away, was found to be 0.2 degree. What will be the angular width of the first minima, if the entire experimental apparatus is immersed in water ? (μwater=4/3) if [...]
Posted in:
Chapter 32 - Ray Optics
,
NEET Last 32 Years Solved 1988 - 2019 Physics and Chemistry Video Solutions
,
Physics
,
Tags:
if the entire experimental apparatus is immersed in water ? (μwater=4/3) ,
In a double slit experiment ,
the angular width of the first minima formed on a screen placed 1m away ,
was found to be 0.2 degree. What will be the angular width of the first minima ,
when light of wavelength 400 nm was used ,
In young’s double-slit experiment the intensity of light at a point on the screen (where the path difference is λ) is I, (λ being the wavelength of light used). The intensity at a point where the path difference is λ/4 will be
21
Aug
In young’s double-slit experiment the intensity of light at a point on the screen (where the path difference is λ) is I, (λ being the wavelength of light used). The intensity at a point where the path difference is λ/4 will be (λ being the wavelength of light used). The intensity at a point where [...]