Number of spectral lines in hydrogen atom is
Number of spectral lines in hydrogen atom is
Options
(a) 8 (b) 6 (c) 15 (d) ∞
Correct Answer:
∞
Explanation:
No explanation available. Be the first to write the explanation for this […]
Physics
If an electron in a hydrogen atom jumps from the 3rd orbit to the 2nd orbit, it emits
If an electron in a hydrogen atom jumps from the 3rd orbit to the 2nd orbit, it emits a photon of wavelength λ. When it jumps from the 4th orbit to the 3rd orbit, the […]
Electrons of mass m with de-Broglie wavelength λ fall on the target in an X-ray tube.
Electrons of mass m with de-Broglie wavelength λ fall on the target in an X-ray tube. The cut-off wavelength (λ₀) of the emitted X-ray is
Options
(a) λ₀= 2mcλ²/h (b) λ₀= 2h/mc (c) λ₀= […]
When an α-particle of mass m moving with velocity ν bombards on a heavy nucleus
When an α-particle of mass m moving with velocity ν bombards on a heavy nucleus of charge Ze, its distance of closest approach from the nucleus depends on m as
Options
(a) 1/√m […]
Given the value of Rydberg constant is 10⁷ m⁻¹, the wave number of the last line
Given the value of Rydberg constant is 10⁷ m⁻¹, the wave number of the last line of the Balmer series in hydrogen spectrum will be
Options
(a) 0.5×10⁷ m⁻¹ (b) 0.25×10⁷ m⁻¹ (c) […]
What is the wavelength of light for the least energetic photon emitted
What is the wavelength of light for the least energetic photon emitted in the Lyman series of the hydrogen spectrum. (take, hc=1240 eV-nm)
Options
(a) 122 nm (b) 82 nm (c) 150 nm […]
Which of the following is true for number of spectral lines in going from Lyman series
Which of the following is true for number of spectral lines in going from Lyman series to Pfund series?
Options
(a) Increases (b) Decreases (c) Unchanged (d) May decrease or increase
Correct Answer: […]
Moderator used in nuclear reactor is
Moderator used in nuclear reactor is
Options
(a) Ice (b) Boron rods (c) Cadmium rods (d) Heavy water
Correct Answer:
Heavy water
Explanation:
No explanation available. Be the first to write the explanation […]
An electron of a stationary hydrogen atom passes from the fifth energy level to
An electron of a stationary hydrogen atom passes from the fifth energy level to the ground level. The velocity that the atom acquired as a result of photon emission will be: (m is the mass […]
An electron in the hydrogen atom jumps from excited state n to the ground state
An electron in the hydrogen atom jumps from excited state n to the ground state. The wavelength so emitted illuminates a photosensitive material having work function 2.75 eV. If the stopping potential of the photoelectron […]