Home
Class 12
PHYSICS
The wavelengths of Kalpha X-rays from l...

The wavelengths of `K_alpha` X-rays from lead isotopes `Pb^(204) , Pb^(206) and Pb^(208)` are `lambda_1, lambda_2 and lambda_3` respectively. Choose the correct alternative.

A

`lambda_(1)=lambda_(2)=lambda_(3)`

B

`lambda_(1)gtlambda_(2)gtlambda_(3)`

C

`lambda_(1)ltlambda_(2)ltlambda_(3)`

D

`lambda_(2)=sqrt(lambda_(1)lambda_(3))`

Text Solution

Verified by Experts

The correct Answer is:
A, D
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • MODERN PHYSICS

    DC PANDEY|Exercise Metch the column|6 Videos

  • MODERN PHYSICS

    DC PANDEY|Exercise Integer Type Questions|17 Videos

  • MODERN PHYSICS

    DC PANDEY|Exercise for JEE Advanced (only one option is Correct)|77 Videos

  • MAGNETISM AND MATTER

    DC PANDEY|Exercise Medical gallery|1 Videos

  • MODERN PHYSICS - 1

    DC PANDEY|Exercise Level 2 Subjective|23 Videos

Similar Questions

Explore conceptually related problems

The wavelengths and frequencies of photons in transition 1,2 and 3 for hydrogen like atom are lambda_(1),lambda_(2),lambda_(3), v_(1),v_(2) and v_(3) respectively. Then:

If lambda_1, lambda_2, lambda_3 are wavelengths of first 3 lines of balmer series. Find lambda_1/lambda_3

Knowledge Check

  • The wavelength of K_(a) , X-rays for lead isotopes Pb^(208),Pb^(206),Pb^(204)" are"lambda_(1),lambda_(2)" and"lambda_(3), resperctively. Then

    A
    `lambda_(1)=lambda_(2)gtlambda_(3)`
    B
    `lambda_(1)gtlambda_(2)gtlambda_(3)`
    C
    `lambda_(1)ltlambda_(2)ltlambda_(3)`
    D
    `lambda_(2)=sqrt(lambda_(1)lambda_(3))`

  • The wavelength of the short radio waves, microwaves, ultraviolet waves are lambda_(1),lambda_(2) and lambda_(3) , respectively, Arrange them in decreasing order.

    A
    `lambda_(1),lambda_(2),lambda_(3)`
    B
    `lambda_(1),lambda_(3),lambda_(2)`
    C
    `lambda_(3),lambda_(2),lambda_(1)`
    D
    `lambda_(2),lambda_(1),lambda_(3)`

  • The wavelengths of photons emitted by electron transition between two similar leveis in H and He^(+) are lambda_(1) and lambda_(2) respectively. Then :-

    A
    `lambda_(2)=lambda_(1)`
    B
    `lambda_(2)=2lambda_(1)`
    C
    `lambda_(2)=lambda_(1)//2`
    D
    `lambda_(2)=lambda_(1)//4`

    • Similar Questions

    Explore conceptually related problems

    if lambda_(Cu) is the wavelength of K_alpha , X-ray line fo copper (atomic number 29) and lambda_(Mo) is the wavelength of the K_alpha X-ray line of molybdenum (atomic number 42), then the ratio lambda_(Cu)/lambda_(Mo) is close to (a) 1.99 (b) 2.14 (c ) 0.50 (d) 0.48

    An electron, a neutron and an alpha particle have same kinetic energy and their de-Broglie wavelength are lambda_e, lambda_n and lambda_(alpha) respectively. Which statement is correct about their de-Broglie wavelengths?

    If lambda_v, lambda_x and lambda_m represents the wavelength of visible light X-ray and microwave respectively then :

    X-ray from a tube with a target A of atomic number Z shows strong K lines for target A and weak K lines for impurities. The wavelength og K_(alpha) lines is lambda_(z) for target A and lambda_(1) and lambda_(2) for two impurities. (lambda_(z))/(lambda_(1)) = 4 and (lambda_(z))/(lambda_(2)) = (1)/(4) Assuming the screeining contant of K_(alpha) lines to be unity select the correct statement(s).

    A dye absorbs a photon of wavelength lambda and re - emits the same energy into two phorons of wavelengths lambda_(1) and lambda_(2) respectively. The wavelength lambda is related with lambda_(1) and lambda_(2) as :

    Home
    Profile