Home
Class 11
CHEMISTRY
Statement : Monochromatic X-rays fall on...

Statement : Monochromatic X-rays fall on lighter elements such as carbon and show scattering and effect is known as Compoton effect .
Explanation : `lambda` scattered light is always lower than ` lmbda` incident light .

A

S is correct but E is wrong

B

S is wrong but E is correct.

C

Both S and E are correct and E is correct explanation of S

D

Both S and E are correct but E is not correct explanation of S

Text Solution

Verified by Experts

The correct Answer is:
A

In Compoton effect ` lambda_("scattered ") gt lambda _("incident ") `.
Promotional Banner

Topper's Solved these Questions

  • ATOMIC STRUCTURE

    P BAHADUR|Exercise Exercise 9|38 Videos
  • ATOMIC STRUCTURE

    P BAHADUR|Exercise Exercise 7|33 Videos
  • CHEMICAL BONDING

    P BAHADUR|Exercise Exercise 7|11 Videos

Similar Questions

Explore conceptually related problems

On passing light from collidal solution, the effect due to scattering of light is known as :

On passing light from colloidal solution, the effect due to scattering of light is known as :

In Raman effect, the scattering of light beams shows

When a beam of monochromatic light is passed through benzene , the spectrum of scattered radiations contains lines whose wavelengths (and frequencies ) are longer or shorter than that of the incident light . This phenomenon is known as

Monochromatic light of wavelength 589nm is incident from air on a water surface. Given, refractive index of water is 1.33. Which of the following statement(s) is/are correct? I. Frequency of reflected light and refracted light are same. II. Wavelength of reflected light is more than that of refracted light. III. Speed of reflected light is equal to that of refracted light. IV. Intensity of reflected light is always more than that of refracted light.

The properties of x -rays as put forwarded by Rontgen in his pioneering paper on the topic are as follos: X -rays posses a very strong pentrative power it can penetrate wood upto 3cm and and aluminium foil upto 15mm . If the hand if the hand is held between the discharge tube and the screen the dark shadow of the of the bones os visible within the slightly dark shadow of the hand" photographc plates and film "show themselves susceptible to x - rays " Hence , photography provided a valuable method of studying the effect of x -rays x rays neither reflected nor reflected refracted (so far as Rontgen could discover ). Hence , " X - rays as cannot be concerted by lenses" X - rays discharge electrified bodies , whether the electrification is positive or negative . X -rays are generated when the cathode rays of the discharge tube strike any solid body .A heavier element , such as plantium , however is much more efficient as a generator of X - rays than a lighter element , such as aluminium . Most of Rontgen 's observation stood the test of time, though some of them needed to be modified later. ,brgt Now today we know if electron are accelerated through a potential difference V , then maximum energy of emitted photon could be E_(max)=eV, (hc)/(lambda_(min))=(hc)/(eV) lambda_(min) is also called cut off wavelength . since electron may loose very small energy in a given collision, the upper value of lambd eill approach infinity . when X -rays is produced in X -ray tube , two types of X -rays spectra and line are observed: continous spectra and line spectra. A continous spectra is produced by bremsstrahlung, the electromagnetic radiation produced when free electron are accelerated during collision with ions. A line spectrum result when an electra having sufficient energy collides with a heavy atom, and an electr in an inner energy level is ejected from the atom . An electra from an outer energy level then fills the vacant inner energy level, resulting in emission of an X -ray photon. The electron knocks out an inner shell electron of the atom with which it collides . Let us take an hypothetical case of a target atom whose K- shell electron has been knocked out as shown. this will create a vacancy in K-shell . sensing this vacancy an electron from a higher energy state may make a trasition to thsi vacant state. when such a transition take placce the differece of energy is converted into photon of electromagnetic radiation, which is called charactertistic X -rays . Now depending upon the shell from which an electron make a trasition to K -shell we may have different lines in the K series of X rays e.g. if electron from L shell jumps to K shell we have K_(alpha), if electron from M shell jumps to K shell we have K_(beta) X -rays and so . on . Monseley conducted many experiment on characteristic X -rays , the finding of whcih played an inportant role in . developing the concept opf atomic number . Moseley's observation can be expressed as sqrtv=a(Z-b) where a and b are constants. Z is the atomic number of target atom n is the frequency . X -rays of high penetratrating power are called hard X -ray. Hard X -rays have energy of the order of 10^(5)eV . the minimum potential differece through ehich the electron should be accelerated in an X -ray tube to obtain X -ray of energy 10^(5)eV is:

Scattering of light by milk is called electrophoretic effect . Is the statement correct ?

Check the correct statements on scattering of light S1 : Rayleigh scattering is responsible for the bluish appearance of sky S2 : Rayleigh scattering is proportional to 1//lambda^(4) when the size of the scatterer is much less than lambda S3 : Clouds having droplets of water (large scattering objects) scatter all wavelengths are almost equal and so are generally white S4 : The sun looks reddish at sunset and sunrise due to Rayleigh scattering

P BAHADUR-ATOMIC STRUCTURE-Exercise 8
  1. Statement : The 3p-orbital has higher energy level than 3s in He^(+) i...

    Text Solution

    |

  2. Statement : Specific charge of alpha-particles is twice to that of pr...

    Text Solution

    |

  3. Statement : d-orbital are five fold non-degenerate in presence of magn...

    Text Solution

    |

  4. Statement : electromangetic radiations will be emitted for the transti...

    Text Solution

    |

  5. Statement : The psi(640) represents an orbital . Explanation : The o...

    Text Solution

    |

  6. Statement : Monochromatic X-rays fall on lighter elements such as carb...

    Text Solution

    |

  7. Statement : .(24)Cr has more paramangetic nature than .(25)Mn. Expl...

    Text Solution

    |

  8. Statement : The possible number of electrons in a subshell is (4l + 2)...

    Text Solution

    |

  9. Statement : Aufbau rule is violated in writing electronic configuratio...

    Text Solution

    |

  10. Humphry series discovered in H-"atomic" spectra has lowest energy rad...

    Text Solution

    |

  11. Assertion (A) : Hydrogen has only one electron in its 1s orbital but i...

    Text Solution

    |

  12. Statement : Wave number of a spectral line for an electronic transitio...

    Text Solution

    |

  13. Statement : The tendency of a atom to reach a stable electronic arrang...

    Text Solution

    |

  14. Statement : For n=3,l may be 0,1 and 2, and (m) may be 0 , 0, +- ...

    Text Solution

    |

  15. Statement : Number of waves in an orbit of atom is equal to number of ...

    Text Solution

    |

  16. Statement : wavelength of (I) line of Humphry series is more than (I) ...

    Text Solution

    |

  17. Statement : All s-orbitla in H-atom corresponds to a non-zero probabil...

    Text Solution

    |

  18. Statement : The energy radiated per unit volume , i.e., energy density...

    Text Solution

    |

  19. Statement : The plot of atomic number ( y -axis ) versus number of neu...

    Text Solution

    |