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प्रश्न
Below is an incomplete table showing the arrangement of electromagnetic spectrum in the increasing order of their wavelength. Complete the table:
| Gamma ray | X - ray | UV rays | Visible rays | Infrared | A | Radio waves |
- Identify the radiation A.
- Name the radiation used to detect fracture in bones.
- Name one property common to both A and Radio waves.
उत्तर
- Microwaves
- X-rays
- Due to their long wavelengths, both microwaves and radio waves are used in long-distance communication.
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संबंधित प्रश्न
Name the electromagnetic radiations used for (a) water purification, and (b) eye surgery.
What is the range of the wavelength of the following electromagnetic waves?
(a) Gamma rays.
State the approximate range of wavelength associated with infrared rays.
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 Kα X-rays of aluminium (Z = 13) and zinc (Z = 30) have wavelengths 887 pm and 146 pm respectively. Use Moseley's law √v = a(Z − b) to find the wavelengths of the Kα X-ray of iron (Z = 26).
(Use Planck constant h = 6.63 × 10-34 Js= 4.14 × 10-15 eVs, speed of light c = 3 × 108 m/s.)
State three properties of infrared radiations similar to that of visible light.
Write two uses of the following radiation.
X-rays
Electromagnetic waves of wavelengths λ1, λ2 and λ3 are used in a radar system, in water purifiers and in remote switches of TV, respectively.
- Identify the electromagnetic waves.
- Write one source for each of them.
What happens when an electron collides with a positron?
Name the electromagnetic radiation that has been used in obtaining the image below.
