
Which of the following are not electromagnetic waves?
A. Cosmic rays
B. Gamma rays
C. β-rays
D. X-rays
Answer
506.4k+ views
Hint: Electromagnetic radiation is a form of energy produced when charged particles move by vibrating magnetic and electric fields. An electromagnetic spectrum is the range of all electromagnetic radiations. To solve this question we check the electromagnetic spectrum, by doing that it would be easy to find the odd one from the options.
Complete step by step answer:
We know what electromagnetic radiation and electromagnetic spectrum is. Electromagnetic spectrum consists of, from shortest wavelength to longest wavelength:
Gamma rays-X rays-Ultraviolet rays-Visible light-Infrared-Microwaves-Radio waves
From this it is clear that cosmic rays are not part of the electromagnetic spectrum, and thus they are not electromagnetic radiation.
Cosmic rays are high energy outer space particles that consist mainly of protons. Or we can say that they are subatomic particles that travel at fractions of the speed of light.
Hence, the correct answer is option A and C.
Additional Information
The electromagnetic spectrum consists of electromagnetic waves. Electromagnetic waves are formed due to the vibration formed between electric and magnetic fields.
Gamma ray is formed by the radioactive decay of atomic nuclei, nuclear explosion, lightning etc. They have the smallest wavelength and the highest energy in the spectrum.
A β-ray is a high energy radiation produced by the atomic nucleus’s radioactive decay by β-decay process. It is used in the medical field for treatment of various diseases like eye, bone cancers. They are also used as tracers.
X-ray is a high energy electromagnetic radiation. Its wavelength ranges from $\text{10pm-10nm}$.X-rays are highly used in medical field mainly for checking fractures
Note:
Cosmic rays are not electromagnetic radiation since they are high energy outer space particles. But β-ray is also not really an electromagnetic radiation because they are charged particles formed during β-decay. But when comparing with cosmic ray, β-ray ray has high chances of being included as an electromagnetic radiation. And hence B-ray is concluded as an electromagnetic radiation and cosmic ray is not.
Complete step by step answer:
We know what electromagnetic radiation and electromagnetic spectrum is. Electromagnetic spectrum consists of, from shortest wavelength to longest wavelength:
Gamma rays-X rays-Ultraviolet rays-Visible light-Infrared-Microwaves-Radio waves
From this it is clear that cosmic rays are not part of the electromagnetic spectrum, and thus they are not electromagnetic radiation.
Cosmic rays are high energy outer space particles that consist mainly of protons. Or we can say that they are subatomic particles that travel at fractions of the speed of light.
Hence, the correct answer is option A and C.
Additional Information
The electromagnetic spectrum consists of electromagnetic waves. Electromagnetic waves are formed due to the vibration formed between electric and magnetic fields.
Gamma ray is formed by the radioactive decay of atomic nuclei, nuclear explosion, lightning etc. They have the smallest wavelength and the highest energy in the spectrum.
A β-ray is a high energy radiation produced by the atomic nucleus’s radioactive decay by β-decay process. It is used in the medical field for treatment of various diseases like eye, bone cancers. They are also used as tracers.
X-ray is a high energy electromagnetic radiation. Its wavelength ranges from $\text{10pm-10nm}$.X-rays are highly used in medical field mainly for checking fractures
Note:
Cosmic rays are not electromagnetic radiation since they are high energy outer space particles. But β-ray is also not really an electromagnetic radiation because they are charged particles formed during β-decay. But when comparing with cosmic ray, β-ray ray has high chances of being included as an electromagnetic radiation. And hence B-ray is concluded as an electromagnetic radiation and cosmic ray is not.
Recently Updated Pages
Master Class 12 Economics: Engaging Questions & Answers for Success

Master Class 12 Maths: Engaging Questions & Answers for Success

Master Class 12 Biology: Engaging Questions & Answers for Success

Master Class 12 Physics: Engaging Questions & Answers for Success

Basicity of sulphurous acid and sulphuric acid are

Master Class 9 General Knowledge: Engaging Questions & Answers for Success

Trending doubts
Which one of the following is a true fish A Jellyfish class 12 biology CBSE

Draw a labelled sketch of the human eye class 12 physics CBSE

a Tabulate the differences in the characteristics of class 12 chemistry CBSE

Differentiate between homogeneous and heterogeneous class 12 chemistry CBSE

Why is the cell called the structural and functional class 12 biology CBSE

What are the major means of transport Explain each class 12 social science CBSE
