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Question
In a cathode ray tube state the purpose of the fluorescent screen.
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Solution
Fluorescent screen helps to obtain images on the screen by converting electrical signals to light (or) visual signals by ionizing radiations to light waves.
RELATED QUESTIONS
What is meant by radioactivity?
What happens to the atomic number of element when (i) An α -particle, (ii) A β -particle 1 and (iii) γ-radiation is emitted?
How is a zinc sulphide screen affected when a cathode ray beam strikes it?
What do you understand by the term radioactivity?
Two radioactive nuclei are represented by xAp and yAq and when p and q are mass numbers and x, y are the atomic number. How can the products be represented, i .e., what are the new values of p, q. x and y after the emission of an α-particle and a β-particle from A and B respectively.
What is the value of the speed of gamma radiations in air or vacuum?
State one use of radio-isotopes.
Which of the following statements is/are correct?
- α particles are photons
- Penetrating power of γ radiation is very low
- Ionization power is maximum for α rays
- Penetrating power of γ radiation is very high
Complete the following radioactive reaction:
\[\ce{^-_-X -> ^-_-Y + ^4_2He -> ^234_91Z + ^0_-1e}\]
While investigating which phenomena was Becquerel studying uranium salts when he discovered radioactivity?
