Home
Class 12
CHEMISTRY
A laser (light amplification by stimulat...

A laser (light amplification by stimulated emission of radiation) provides a coherent (in phase )nearly monochromatic source of high intensityi light. Lasers are used in eye surger, CD/DVD players basic research etc. some miodern eye lasers can be tuned to emit a desired wavelength. The following table shows the `lamda(nm),v(s^(-1))` and E(J) but some of the data is missing.

The value of A and H will be ............ and .................. respectively.

A

`6329Å,6.14xx10^(12)`

B

`6329Å,4.5xx10^(24)`

C

`4.5xx10^(15),1401Å`

D

`1401Å,6.14xx10^(12)`

Text Solution

Verified by Experts

For A
`C=v lamda, lamda =C/v`
`lamda=(3xx10^(8)ms^(-1))/(4.74xx10^(14)s^(-1))=6329xx10^(-10)M`
`lamda=6329Å=A`
For (H)`E=hv , v=E/h`
`v=(3xx10^(-9)J)/(6.63xx10^(-34)Js)=4.5xx10^(24)`
Promotional Banner

Topper's Solved these Questions

  • ATOMIC STRUCTURE

    FIITJEE|Exercise MATCHING TYPE QUESTIONS|1 Videos
  • ATOMIC STRUCTURE

    FIITJEE|Exercise REASONING TYPE QUESTIONS|14 Videos
  • ATOMIC STRUCTURE

    FIITJEE|Exercise COMPREHENSION-I|3 Videos
  • ALKYL AND ARYL HALIDES

    FIITJEE|Exercise NUMERICAL BASED QUESTIONS|1 Videos
  • CARBOHYDRATES, AMINO ACIDS, POLYMERS AND PRACTICAL ORGANIC CHEMISTRY

    FIITJEE|Exercise EXERCISE|4 Videos

Similar Questions

Explore conceptually related problems

Lasers are used in

A laser (light amplification by stimulated emission of radition ) provides a coherent (in phase) monochoramtic source of high intensity light . Lasers are used in eye surgery,CD/DV players basic research etc. Some modern eye lasers can be "tuned" to emit a desired wavelenght . The following table shows the lambda=(nm),v(s^(-1)) and E(J) but some of the date missing : [Take E(ev)=(1240)/lambda_(nm)] {:("Leser No.",lambda("nm"),v(s^(-1)),"Energy (J)"),("I",A,5xx10^(-14),B),("II",487.9,C,D),("III",E,F,3.2xx10^(-19)):} The value of A and F will be..............and ...........respesctively.

A laser (light amplification by stimulated emission of radition ) provides a coherent (in phase) monochoramtic source of high intensity light . Lasers are used in eye surgery,CD/DV players basic research etc. Some modern eye lasers can be "tuned" to emit a desired wavelenght . The following table shows the lambda=(nm),v(s^(-1)) and E(J) but some of the date missing : [Take E(ev)=(1240)/lambda_(nm)] {:("Leser No.",lambda("nm"),v(s^(-1)),"Energy (J)"),("I",A,5xx10^(-14),B),("II",487.9,C,D),("III",E,F,3.2xx10^(-19)):} If an electron absorbs energy equal to D in a excited single hydrogen atom . How many maximum possible lines will be obtained in hydrogen spectrum when electron returns to ground level?

A laser (light amplification by stimulated emission of radition ) provides a coherent (in phase) monochoramtic source of high intensity light . Lasers are used in eye surgery,CD/DV players basic research etc. Some modern eye lasers can be "tuned" to emit a desired wavelenght . The following table shows the lambda=(nm),v(s^(-1)) and E(J) but some of the date missing : [Take E(ev)=(1240)/lambda_(nm)] {:("Leser No.",lambda("nm"),v(s^(-1)),"Energy (J)"),("I",A,5xx10^(-14),B),("II",487.9,C,D),("III",E,F,3.2xx10^(-19)):} Which of the following statements(s) is /are correct? (i) All the three radiation (from laser ) lie in visble region (ii) The enegies D and B alone are not sufficient to remove electron completely from isolated gaseous H-atoms which is present at ground state (iii) In the spectrum the increasing order of lambda for the type of lasers is IIltIIIltI (iv) None of the above statement is correct

Laser is/ are