Match List-I with List-II
| List-I | List-II |
| Electromagnetic Wave | Application |
| (A) Microwaves | (I) Photographs during foggy season and night vision cameras |
| (B) X-rays | (II) Radar |
| (C) Gamma rays | (III) Photographs internal parts of human body |
| (D) Infrared rays | (IV) Radiotherapy for malignant tumors in cancer treatment |
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → (A) - (II), (B) - (III), (C) - (IV), (D) - (I)
Each part of the electromagnetic spectrum is used for what its wavelength and energy suit.
(A) Microwaves — this matches (II) Radar. Their short wavelength lets them be sent as narrow beams that reflect from aircraft and other objects.
(B) X-rays — this matches (III) Photographs internal parts of human body. They pass through soft tissue but are absorbed by bones, which gives a shadow picture of the inside of the body.
(C) Gamma rays — this matches (IV) Radiotherapy for malignant tumors in cancer treatment. Their very high energy can destroy cancer cells.
(D) Infrared rays — this matches (I) Photographs during foggy season and night vision cameras. Infrared radiation is emitted by warm bodies and is scattered less by fog than visible light.
NCERT (2026-27):
Microwaves – “Microwaves (short-wavelength radio waves), with frequencies in the gigahertz (GHz) range, are produced by special vacuum tubes (called klystrons, magnetrons and Gunn diodes). Due to their short wavelengths, they are suitable for the radar systems used in aircraft navigation.”
X-Rays – “… X-rays are used as a diagnostic tool in medicine and as a treatment for certain forms of cancer.”
Gamma Rays – “… This high frequency radiation is produced in nuclear reactions and also emitted by radioactive nuclei. They are used in medicine to destroy cancer cells.”