Physics
A photoelectric surface is illuminated successively by monochromatic light of wavelength λ and λ/2. If the maximum kinetic energy of the emitted photoelectrons in the second case is 3 times than in the first case , the work function of the surface of the material is (h=Planck′s constant,c=speed of light)
21
Aug
A photoelectric surface is illuminated successively by monochromatic light of wavelength λ and λ/2. If the maximum kinetic energy of the emitted photoelectrons in the second case is 3 times than in the first case , the work function of the surface of the material is (h=Planck′s constant,c=speed of light) Pick the wrong answer in [...]
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 [...]
Photons with energy 5eV are incident on a cathode C in a photoelectric cell . The maximum energy of emitted photoelectrons is 2eV. When photons of energy 6eV are incident on C, no photoelectrons will reach the anode A, if the stopping potential of A relative to C is energy of emitted photoelectrons is 2eV. When photons of energy 6eV are incident on C, no photoelectrons will reach the anode A, if the stopping potential of A relative to C is
21
Aug
Photons with energy 5eV are incident on a cathode C in a photoelectric cell . The maximum energy of emitted photoelectrons is 2eV. When photons of energy 6eV are incident on C, no photoelectrons will reach the anode A, if the stopping potential of A relative to C is energy of emitted photoelectrons is 2eV. [...]
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Chapter 29 - Dual Nature of Matter and Radiation
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if the stopping potential of A relative to C is ,
if the stopping potential of A relative to C is energy of emitted photoelectrons is 2eV. When photons of energy 6eV are incident on C ,
no photoelectrons will reach the anode A ,
Photons with energy 5eV are incident on a cathode C in a photoelectric cell . The maximum energy of emitted photoelectrons is 2eV. When photons of energy 6eV are incident on C ,
When a metallic surface is illuminated with radiation of wavelength λ the stopping potential is V. If the same surface is illuminated with radiation of wavelength 2λ, the stopping potential is V/4. the threshold wavelength for the metallic surface is.
21
Aug
When a metallic surface is illuminated with radiation of wavelength λ the stopping potential is V. If the same surface is illuminated with radiation of wavelength 2λ, the stopping potential is V/4. the threshold wavelength for the metallic surface is. the stopping potential is V/4. the threshold wavelength for the metallic surface is When a [...]
The photoelectric threshold wavelength of silver is 3250×10^−10m. The velocity of the electron ejected from a silver surface by ultraviolet light of wavelength 2536×10−10m is : (Given h=4.14×10−15eVs and c=3×108ms−1)
21
Aug
The photoelectric threshold wavelength of silver is 3250×10^−10m. The velocity of the electron ejected from a silver surface by ultraviolet light of wavelength 2536×10−10m is : (Given h=4.14×10−15eVs and c=3×108ms−1) August 21, 2020 Category: Chapter 29 - Dual Nature of Matter and Radiation , NEET Last 32 Years Solved 1988 - 2019 Physics and Chemistry [...]
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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Chapter 32 - Ray Optics
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NEET Last 32 Years Solved 1988 - 2019 Physics and Chemistry Video Solutions
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Physics
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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 - [...]