Physics - Study Mode

[#581] Gamma rays have greatest similarity with
Correct Answer

(C) X-rays

Explanation

Solution: Gamma radiation, also known as gamma rays or hyphenated as gamma-rays and denoted as y, is electromagnetic radiation of high frequency and therefore high energy. Gamma rays are ionizing radiation and are thus biologically hazardous. They are classically produced by the decay from high energy states of atomic nuclei (gamma decay), but are also created by other processes. X-radiation (composed of X-rays) is a form of electromagnetic radiation. X-rays
have a wavelength in the range of 0.01 to 10 nanometers, corresponding to frequencies in the range 30 petahertz to 30 exahertz (3×1016 Hz to 3×1019 Hz) and energies in the range 100 eV to 100 keV. They are shorter in wavelength than UV rays and longer than gamma rays.

[#582] Heavy water is used in nuclear reactor to
Correct Answer

(A) Slow down neutron

Explanation

Solution: Heavy water is used in nuclear reactor to slow down neutron.

[#583] Radiocarbon is produced in the atmosphere as a result of
Correct Answer

(A) Collision between fast neutrons and nitrogen nuclei present in the atmosphere
(E) Collision between fast neutrons and nitrogen nuclei present in the atmosphere.

Explanation

Solution: Radiocarbon is produced in the atmosphere as a result of collision between fast neutrons and nitrogen nuclei present in the atmosphere.

[#584] What are the particles emitted by radioactive element after 3 consecutive disintegration?
Correct Answer

(C) 2 beta 1 alpha

Explanation

Solution: 2 beta and 1 alpha emitted by radioactive element after 3 consecutive disintegration.

[#585] What is the wavelength of visible spectrum ?
Correct Answer

(B) 3900 A° – 7600 A°

Explanation

Solution: 3900 A° – 7600 A° is the wavelength of visible spectrum.