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A beam of ultraviolet radius hacking wavelength between `100nm and 200nm` is inclined on a sample of atomic hydrogen gas. Assuming that the atoms are

Monjur Alahi

A beam of ultraviolet radius hacking wavelength between `100nm and 200nm` is inclined on a sample of atomic hydrogen gas. Assuming that the atoms are in ground state which wavelength will have low intensity in the transmitted been? If the energy of a photon is equal to the ground state it hasl arge probability of being observed by on atom in the ground state


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Salim Ahmed Kawsar

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Correct Answer - `[lambda_(1) = 122 nm; lambda_(2) = 103 nm]`

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Hydrogen like atoms (atomic number `= Z`) in a sample are in excited state with principal quantum number n. The emission spectrum of the sample has `1

Correct Answer - `Z = 3`

2 Answers 3 views
Consider a gas of hydrogen atom filling a cubical box of side length 1 m. Assume that all hydrogen atoms are in their ninth excited state and they fil

Correct Answer - `8 xx 10^(23)`

2 Answers 3 views
Hydrogen atoms in very high quantum state have been observed in radio astronomy. The wavelength of radiation emitted when hydrogen atom makes transiti

Correct Answer - `5.8 cm`

2 Answers 1 views
Absorption spectrum is obtained for a sample of gas having atomic hydrogen in ground state. Which lines of the spectrum will be in the range `94 nm` t

Correct Answer - `94.7 nm, 96.9 nm, 102.2 nm, 121 nm`

2 Answers 2 views
A sample of germanium is doped to the extent of `10^(14)` donor atoms per `cm^(3)` and `7xx10^(13)` acceptor atoms per `cm^(3)`. The resistivity of pu

Correct Answer - `52.3mAcm^(-2)`

2 Answers 5 views
A laser beam has a wavelength of `6xx10^(-7)`m and aperture of `6xx10^(-2)`m. The beam is sent towards the moon which is at a distance of `4xx10^(8)`m

Correct Answer - (i)`1.22xx10^(-5)rad(ii) 2.381xx10^(7)`m

2 Answers 1 views
A laser beam has a power of 100 mW. It has an aperture of `5xx10^(-3)`m and emits a wavelength 6943 Å. The beam is focused with a lens of focal length

Correct Answer - `2.87xx10^(-10)m^(2),3.48xx10^(8)Wm^(-2)`

2 Answers 1 views
A hydrogen atom in ground state absorbs a photon of ultraviolet radiation of wavelength `50 nm` Assuming that the entire photon energy is taken up by

Correct Answer - `[11.2eV]`

2 Answers 1 views
A parallel beam, of light of wavelength 100 nm passed through a sample of atomic hydrogen gas in ground state. (a) Assume that when a phton supplies s

Correct Answer - `[(a) 100nm, 560 nm, 3880 m; (b) 103nm, 121 nm, 654 nm]`

2 Answers 1 views
A student added few drops of universal indicator to a given colourless sample and observed the sample turning to red. The nature of sample is 

Correct option is  B) acid

2 Answers 1 views

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