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Ray optics is valid, when characteristic...

Ray optics is valid, when characteristic dimensions are

A

Of the same order as the wavelength of light

B

Much smaller than the wavelength of light

C

Of the order of one millimetre

D

Much larger than the wavelength of ligh

Text Solution

Verified by Experts

The correct Answer is:
D
Ray optics is valid when size of the objects is much larger than the order of wavelength of light.
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Which of the following is accompanied by the characteristic X - ray emission ?

When high energetic electron beam , (i.e., cathode rays) strike the heavier metal, then X-ray are produced. Spectrum of X-ray are classified into two categories: (i) continous spectrum, and (ii) characteristic depends only on the potential difference across the electrode. But wavelength of characteristic spectrum depends on the atomic number (z) . The production of characteristic X-ray is due to the

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ERRORLESS-RAY OPTICS-NCERT BASED QUESTIONS (Refraction of Light at Plane Surfaces)
  1. To an observer on the earth the stars appear to twinkle. This can be a...

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  2. When light travels from one medium to the other of which the refractiv...

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  3. Ray optics is valid, when characteristic dimensions are

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  4. The refractive index of a certain glass is 1.5 for light whose wavelen...

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  5. A light wave has a frequency of 4xx10^(14)Hz and a wavelength of 5xx10...

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  6. A beam of light propagating in medium A with index of refraction n ( A...

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  7. When a light wave goes from air into water, the quality that remains ...

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  8. The refractive indices of glass and water are 3/2 and 4/3 respectively...

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  9. Refractive index of glass is (3)/(2) and refractive index of water is ...

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  10. Monochromatic light of wvalength 589 nm is incident from air on a wate...

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  11. Light waves travel from optically rarer medium to optically deser med...

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  12. Which of the following graphs shows appropriate variation of refractiv...

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  13. A monochromatic beam of light is travelling from medium A of refractiv...

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  14. If epsi(0) and mu(0) are respectively, the electric permittivity and t...

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  15. The refractive index and the permiability of a medium are respectively...

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  16. A ray of light is travelling from glass to air. ("Refractive index of ...

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  17. On a glass plate, a light wave is incident at an angle of 60^(@). If t...

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  18. A material is embedded between two glass plates. Refractive index n o...

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  19. The angles of incidence and refraction of a monochromatic ray of light...

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  20. A vessel of depth 2d cm is half filled with a liquid of refractive ind...

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