Advertisements
Advertisements
Question
To which regions of the electromagnetic spectrum do the following wavelengths belong:
(a) 250 nm
(b) 1500 nm
Advertisements
Solution
(a) 250 nm → Ultraviolet
(b) 1500 nm → UV - Ray, Infrared
APPEARS IN
RELATED QUESTIONS
(a) Give a list of at least five radiations, in order of their increasing frequencies, which make up the complete electromagnetic spectrum.
(b) Which of the radiation mentioned by you in part (a) has the highest penetrating power.
A wave has a wavelength of 10-3 nm. Name the wave.
Give the range of wavelength of the electromagnetic waves visible to us.
Can X-rays be used for photoelectric effect?
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 ?
For harder X-rays,
(a) the wavelength is higher
(b) the intensity is higher
(c) the frequency is higher
(d) the photon energy is higher.
Mark the correct options.
(a) An atom with a vacancy has smaller energy that a neutral atom.
(b) K X-ray is emitted when a hole makes a jump from the K shell to some other shell.
(c) The wavelength of K X-ray is smaller than the wavelength of L X-ray of the same material.
(d) The wavelength of Kα X-ray is smaller than the wavelength of Kβ X-ray of the same material.
Answer briefly.
Name the most harmful radiation entering the Earth's atmosphere from outer space.
Answer briefly.
Why high-frequency carrier waves are used for the transmission of audio signals?
Give any two uses of infrared waves.
