Advertisements
Advertisements
Question
An electromagnetic radiation is used for photography in fog. [2]
(i) Identify the radiation.
(ii) Why is this radiation mentioned by you, ideal for this purpose ?
Solution
(i) Infared radiation.
(ii) They have low frequency, the energy associated with them is also low so they do not scatter much and can penetrate appreciably through it.
APPEARS IN
RELATED QUESTIONS
When does the nucleus of an atom tend to become radioactive?
What are free electrons?
Represent the change in the nucleus of a radioactive element when a β particle is emitted.
A radioactive nucleus `""_"Z"^"A"` X first emits a beta particle and then an alpha particle to give the resulting nucleus `""_"Q"^"P"` Y What will be the values of P and Q in terms of A and Z?
Define mass number of an element.
Name a common device where a hot cathode ray tube is used.
What do you understand by the term radioactivity?
Name the Different Radiations Which Are Emitted by the Radioactive Substances.
Are all the radiations mentioned by you, emitted in a single radioactive decay?
Justify with reason, whether the following nuclear reactions are allowed or not.
\[\ce{^A_Z X -> ^A_{Z - 2}X + ^4_{2}He}\]
Heavy radioactive elements eventually turn into ______.
