Question
The Lyman series in hydrogen atom spectrum lies in:
Solution
The hydrogen atom emits radiation when an electron transitions from a higher energy level to a lower one. These transitions form distinct spectral series , named based on which energy level the electron lands in. The Lyman series refers to all transitions in which the electron falls to the first (ground) energy level . Because the gap between the first level and higher levels is large, these transitions release high-energy photons .
- The energy of photons in the Lyman series is greater than that in any other hydrogen spectral series.
- High-energy photons correspond to short wavelengths , and such wavelengths fall in the ultraviolet (UV) region of the electromagnetic spectrum.
- All lines in the Lyman series lie within the UV range and are not visible to the naked eye .
- These are typically observed using instruments that can detect ultraviolet light.
- The Balmer series lies in the visible region .
- The Paschen, Brackett, and Pfund series fall in the infrared region , where the photon energies are lower.
2, 2, 6, 30, ?, 1890
What will come in place of (?) question mark in the given number series.
5, 15, 35, 75, 155, ?
40 41 37 46 ? 55 19
...18, 22, 28, 38, 54, ?,
5 6 15 40 89 170 ?
...What will be the geometric mean of 'Q' and 'P - Q'.
25 54 ? 228 460 924
...4, 4, 5, ? , 248, 1248
14 36 80 168 ? 696
21, 28, 39, 52, ?, 88