Penetrating power of X-rays does not depend on _____.
Important Questions on Physics
Consider the following statements:
1. All radioactive elements decay exponentially with time.
2. Half-life time of radioactive element is the time required for one-half of the radioactive atoms to disintegrate.
3. Age of the Earth can be determined by radiocarbon dating.
4. Half-life time of a radioactive element is 50% of its average life period.
Which of the statements given above are correct?
Consider the statements
1. Photon is a particle of light.
2. Mass of photon is not defined.
3. Speed of photon is as the speed of light.
4. Photons are charged.
Which options is/are correct?
Consider the following statements
1. The fusion of hydrogen into helium is more likely to take place at high temperature and high pressure.
2. Energy generation in stars is mainly due to fusion of light nuclei.
3. Neutrino is a particle which has no charge but has spin.
4. Nucleon is a common name for electron and neutron.
Which of the statement(s) given above are correct?
Consider the following statements
1. Alpha rays emitted from a radioactive substance are helium nuclear.
2. Beta rays emitted by radioactive substance are charged particles emitted by the nucleus.
3. Gamma rays are electromagnetic waves.
4. The nuclear force is a short range force.
Which of the statements given above are correct?
