The radiations with highest speed are _______.
Correct answer: B. Gamma radiations
- A. Alpha radiations
- B. Gamma radiations
- C. Beta radiations
- D. AOT
Explanation
Gamma radiation travels at the speed of light in vacuum, about 3.0 x 10^8 m/s, whereas alpha and beta particles travel below this speed because they have mass. Beta particles are very fast, so students may select beta, but they still do not reach the speed of electromagnetic gamma radiation in vacuum.
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About Spectrum of Hydrogen
The hydrogen spectrum consists of discrete emission lines produced when electrons fall between quantised energy levels and release photons. Questions use the Rydberg equation, photon energy and wavelength, and identify the Lyman, Balmer, Paschen, Brackett and Pfund series, which differ from continuous spectra.
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