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#1 Class 12 Physics Dual Nature of Radiation and Matter 2020 Mcq 1M CBSE
The number of photons of frequency $10^{14}$ Hz in radiation of energy $6.62$ J will be
A. $10^{10}$
B. $10^{15}$
C. $10^{20}$
D. $10^{25}$
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#2 Class 12 Physics Wave Optics 2022 Short 2M CBSE
A beam of light of wavelength $\lambda = 600$ nm from a distant source falls on a single slit 1 mm wide and the diffraction pattern is observed on a screen 2 m away. Find the distance between the first dark fringes on...
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#3 Class 12 Physics Wave Optics 2021 Short 2M CBSE
If the 5th order maximum of wavelength 4000 Å in Young's double slit experiment coincides with the $n$th order maximum of wavelength 5000 Å, find $n$.
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#4 Class 12 Physics Wave Optics 2022 Short 2M CBSE
Two waves have amplitude ratio 5:1 and produce interference. Find the ratio of maximum to minimum intensity.
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#5 Class 12 Physics Wave Optics 2023 Short 3M CBSE
A slit is illuminated by monochromatic light of wavelength $\lambda = 6000$ Å. The angular width of the central maximum in diffraction is measured. When the slit is next illuminated by light of wavelength $\lambda'$, ...
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#6 Class 12 Physics Wave Optics 2021 Short 2M CBSE
Write two differences between interference pattern and diffraction pattern.
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#7 Class 12 Physics Wave Optics 2022 Short 2M CBSE
In a double slit experiment using light of wavelength 600 nm, the angular width of the fringe formed on a distant screen is 0.1°. Find the spacing between the two slits.
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#8 Class 12 Physics Wave Optics 2020 Short 2M CBSE
Define a wavefront. How is it different from a ray?
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#9 Class 12 Physics Wave Optics 2021 Short 2M CBSE
In Young's double-slit experiment using monochromatic light of wavelength $\lambda$, the intensities of two sources are equal ($I_0$ each). Find the intensity at a point where the path difference between wavefronts is...
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#10 Class 12 Physics Wave Optics 2022 Short 3M CBSE
A beam of light consisting of two wavelengths 4000 Å and 6000 Å is used in Young's double-slit experiment. Find the least distance from the central maximum where a dark fringe due to one wavelength coincides with a da...
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#11 Class 12 Physics Wave Optics 2023 Short 3M CBSE
How are wavefront and secondary wavelets defined? Verify the laws of reflection using Huygens' wave theory.
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#12 Class 12 Physics Wave Optics 2022 Short 3M CBSE
Two nearby narrow slits are illuminated by a single monochromatic source. Name the pattern on the screen. One slit is covered. Name the new pattern and write two differences between them.
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#13 Class 12 Physics Wave Optics 2021 Short 2M CBSE
Give two differences between interference and diffraction of light.
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#14 Class 12 Physics Wave Optics 2019 Short 1M CBSE
Draw a graph showing the variation of intensity against position $x$ on the screen in Young's double slit experiment.
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#15 Class 12 Physics Wave Optics 2022 Short 3M CBSE
For a single slit of width $a$, the first minimum occurs at angle $\lambda/a$. At the same angle $\lambda/a$, we get a maximum for two narrow slits separated by distance $a$. Explain.
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#16 Class 12 Physics Wave Optics 2021 Short 2M CBSE
What will happen if Young's double slit experiment is performed in water?
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#17 Class 12 Physics Wave Optics 2020 Short 2M CBSE
State Huygens' principle of diffraction of light.
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#18 Class 12 Physics Wave Optics 2019 Short 2M CBSE
What will be the effect on interference fringes if red light is replaced by blue light?
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#19 Class 12 Physics Wave Optics 2021 Short 2M CBSE
What happens to fringe width when the separation between the slits as well as the distance of the screen from the slits are both halved?
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#20 Class 12 Physics Wave Optics 2018 Short 1M CBSE
State the principle of superposition of waves.
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