Advertisements
Advertisements
प्रश्न
Name the radiations of wavelength just longer than 8 × 10-7m.
Advertisements
उत्तर
Infrared radiations are longer than 8 × 10-7m = `(8 xx 10^-7)/(10^-10)` = 8000 Å
APPEARS IN
संबंधित प्रश्न
The terminology of different parts of the electromagnetic spectrum is given in the text. Use the formula E = hv (for energy of a quantum of radiation: photon) and obtain the photon energy in units of eV for different parts of the electromagnetic spectrum. In what way are the different scales of photon energies that you obtain related to the sources of electromagnetic radiation?
Name the region beyond the red end of the spectrum.
What do you understand by the invisible spectrum?
Two waves A and B have wavelength 0.01 Å and 9000 Å respectively.
- Name the two waves.
- Compare the speeds of these waves when they travel in vacuum.
Can Lα X-ray of one material have shorter wavelength than Kα X-ray of another?
Frequencies of Kα X-rays of different materials are measured. Which one of the graphs in the figure may represent the relation between the frequency v and the atomic number Z ?
The X-ray beam emerging from an X-ray tube
For a given material, the energy and wavelength of characteristic X-rays satisfy
(a) E(Kα) > E(Kβ) > E(Kγ)
(b) E(Mα) > E(Lα) > E(Kα)
(c) λ(Kα) > λ(Kβ) > λ(Kγ)
(d) λ(Mα) > λ(Lα) > λ(Kα).
Name two sources of ultraviolet radiation.
One requires 11eV of energy to dissociate a carbon monoxide molecule into carbon and oxygen atoms. The minimum frequency of the appropriate electromagnetic radiation to achieve the dissociation lies in ______.
