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Let us list some of the factors, which c...

Let us list some of the factors, which could possibly influence the speed of wave propagation :
(i) nature of the source ii) direction of propagation (iii) motion of the source and/or observer iv) wavelength v) intensity of the wave On which of these factors, if any, does
the speed of light in vacuum

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The speed of light in vacuum is a universal constant, independent of all the factorslisted
and anything else.
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Let us list some of the factors, which could possibly influence the speed of wave propagation : (i) nature of the source ii) direction of propagation (iii) motion of the source and/or observer iv) wavelength v) intensity of the wave On which of these factors, if any, does the speed of light in a medium (say, glass or water), depend ?

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Radioactive decay is a statisticle process i.e., we cannot precisely predict the timing of a particular radioactivity of a particular nucleus . The nucleus can disintegrate immediately or it may take infinite time . Simply the probability of the number of nuclei being disintegrated at any instant can be predicted . the rate at which a particular decay process in a radioactive sample is directly proportional to the number of radioactive nuclei present and thus obeys first order kinetics . the factor dN/N expresses the fraction of nuclei decayed in time dt. t_(1//2) is the time in which half of the atoms are decayed and average life is the time for the nucleus to survive before decay . A freshly prepared radioactive source of half period 2 hour emits radiations on intensity which is 64 times of the permissible safe level. The minimum time after which it would be possible to work with this source is :

The amount of energy released when an electron is added to an isolated gaseous atom to produce a monovalent anion is called electron affinity or first electron affinity or electron gain enthalpy. The first electron is given a negative sign as the addition of an electron to a neutral atom is an exoergic process. The addition of electron to A^(-1) requires energy to overcome the force of repulsion. Thus, the second electron affinity is an endoergic process. The magnitude of electron affinity depends on a number of factors such as (i) atomic size (ii) effective nuclear charge (iii) screening effect (iv) half and fully filled orbitals and (v) shape of orbital. In general, electron affinity increases as the atomic radii decrease in a period. However, there are exceptions when the atoms have stable configurations. In a group, electron affinity decreases as the size increases. However, the members of 3rd period have somewhat higher values than the members in the 2nd period of the same subgroups. Which of the following processes is endoergic in nature ?

VIKRAM PUBLICATION ( ANDHRA PUBLICATION)-WAVE OPTICS -Additional Exercises
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  2. The 6563 Å Ha line emitted by hydrogen in a star is found to be red-sh...

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  3. Explain how Corpuscular theory predicts the speed of light be greater ...

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  4. You have learnt in the text how Huygens' principle leads to the laws o...

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  5. Let us list some of the factors, which could possibly influence the sp...

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  6. Let us list some of the factors, which could possibly influence the sp...

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  7. For sound waves, the Doppler formula for frequency shift differs sligh...

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  8. In double-slit experiment using light of wavelength 600 nm, the angula...

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  9. Answer the questions : In a single slit diffraction experiment, the ...

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  10. Answer the questions : In what way is diffraction from each slit re...

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  11. Answer the questions : When a tiny circular obstacle is placed in t...

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  12. Answer the questions : Two students are separated by a 7 m partitio...

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  13. Answer the questions : Ray optics is based on the assumption that l...

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  14. Two towers on top of two hills are 40 km apart. The line joining them ...

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  15. A parallel beam of light of wavelength 500 nm falls on a narrow slit a...

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  16. Answer the questions : When a low flying aircraft passes overhead, w...

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  17. Answer the questions : As you have learnt in the text, the principl...

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  18. In deriving the single slit diffraction pattern, it was stated that th...

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