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In a laboratory experiment on emission f...

In a laboratory experiment on emission from atomic hydrogen in a discharge tube only a small number of lines are observed whereas a large number of lines are pressent in the hydrogen spectrum of a star .This is because in a laboratory

A

the amount of hydrogen taken is smaller than that pressent in the star

B

the temperature of hydrogen is much smaller than that of the star

C

the pressure of hydrogen is much smaller than that of the star

D

the gravitational pull is much smaller than that of the star

Text Solution

Verified by Experts

The correct Answer is:
B
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Knowledge Check

  • What is the number of spectral line in a hydrogen spectrum ?

    A
    Infinite
    B
    1
    C
    3
    D
    4

  • The wave number of the H_(a)- line in Balmer series of hydrogen spectrum is

    A
    `5R//36`
    B
    `3R//16`
    C
    `21R//100`
    D
    `3R//4`

  • The wave number of first emission line in the atomic spectrum of hydrogen in the Balmer series is

    A
    `(5R)/(36)cm^(-1)`
    B
    `(3R)/(4)cm^(-1)`
    C
    `(7R)/(144)cm^(-1)`
    D
    `(9R)/(400)cm^(-1)`

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