(a) The wavelength and the frequency of the line of the Balmer series for hydrogen. Consider first at the Lyman series on the right of the diagram; this is the broadest series, and the easiest to decipher. The He II Lyman lines have almost exactly one-quarter the wavelength of their hydrogen equivalents: for example, He II Lyman-α is at 30.4 nm, and the corresponding Lyman limit is at 22.7 nm. If $\upsilon_{1}$ is the frequency of the series limit of Lyman series, $\upsilon_{2}$ is the frequency of the first line of Lyman series and $\upsilon_{3}$ is the frequency of the series limit of the Balmer series, then 10. The series was discovered during the years 1906-1914, by Theodore Lyman. The Wave Number in Series: The wavenumber of a photon is the number of waves of the photon in a unit length. The frequency scale is marked in PHz—petaHertz. What transition in the hydrogen spectrum would have the same wavelength as the Balmer transition. The rest of the lines of the spectrum were discovered by Lyman from 1906-1914. The first line in the ultraviolet spectrum of the Lyman series was discovered in 1906 by Harvard physicist Theodore Lyman, who was studying the ultraviolet spectrum of electrically excited hydrogen gas. If radiation of frequency 2v impinges on the metal plate, the maximum possible velocity of the emitted electrons will be (m is the electron mass) C. 1841 Views. If you are on a personal connection, like at home, you can run an anti-virus scan on your device to make sure it is not infected with malware. • The first six series have specific names: Lyman series with \(n_1 = 1\) Series limit frequency of the Lyman series is given byvL = RcZ2112-1∞2νL = RcZ2 ... (1)Series limit frequency of the Pfund seriesvp = RcZ2 152-1∞2vp = vL25 R = Rydberg constant = 1.097 × 10+7 m. n1 = 1 n2 = 2 1.4k SHARES. The quantity "hertz" indicates "cycles per second". Thus it is named after him. Calculate the wave number, wavelength and frequency first line of hydrogen spectrum, Maximum wave length corresponds to minimum frequency i.e., n. Calculate the wave number and wavelength of the first spectral line of Lyman series of hydrogen spectrum. 10. Therefore plugging in the values 1 λ = R(1 (1)2 − 1 (2)2)⋅ 12 Since the atomic number of Hydrogen is 1. to the first orbit (principal quantum number = 1). This discussion on the ratio of minimum wavelength of Lyman and balmer series will be ? Peta means "10 15 times". Maximum wave length corresponds to minimum frequency i.e., n1 = 1, n2 = 2. Students (upto class 10+2) preparing for All Government Exams, CBSE Board Exam, ICSE Board Exam, State Board Exam, JEE (Mains+Advance) and NEET can ask questions from any subject and get quick answers by subject teachers/ experts/mentors/students. Number In What Region Of The Electromagnetic Spectrum Is This Line Observed? The spectrum of radiation emitted by hydrogen is non-continuous. is done on EduRev Study Group by Class 11 Students. All the wavelength of Lyman series falls in Ultraviolet band. Please enable Cookies and reload the page. 1.4k VIEWS. According to Bohr’s model, Lyman series is displayed when electron transition takes place from higher energy states(n h =2,3,4,5,6,…) to n l =1 energy state. The Lyman series is caused by electron jumps between the ground state and higher levels of the hydrogen atom. In hydrogen, its wavelength of 1215.67 angstroms (121.567 nm or 1.21567×10 m), corresponding to a frequency of 2.47×10 hertz, places the Lyman-alpha line in the vacuum ultravioletpart of the electromagnetic spectrum, which is absorbed by ai… since the electron is de-exited from 1(st) exited state (i.e n = 2) to ground state (i.e n = 1) for first line of Lyman series. That gives a value for the frequency of 3.29 x 10 15 Hz - in other words the two values agree to within 0.3%. 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