Match List – I with List – II.
| List - I | List - II | ||
|---|---|---|---|
| (A) | Infra red waves | (I) | to detect fracture of bones |
| (B) | Radio waves | (II) | absorbed by the ozone layer of atmosphere |
| (C) | X-rays | (III) | to treat muscular pain |
| (D) | Ultraviolet rays | (IV) | for broadcasting |
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → (A)-(III), (B)-(IV), (C)-(I), (D)-(II)
(A) Infra red waves — this matches (III) to treat muscular pain. Infrared waves are heat waves, and infrared lamps are used in physical therapy.
(B) Radio waves — this matches (IV) for broadcasting. Radio and TV signals are carried by radio waves.
(C) X-rays — this matches (I) to detect fracture of bones. X-rays pass through flesh but are absorbed by bone.
(D) Ultraviolet rays — this matches (II) absorbed by the ozone layer of atmosphere. Most of the harmful ultraviolet light of the sun is absorbed in the ozone layer.
NCERT (2026-27):
Radio Waves – “Radio waves are produced by the accelerated motion of charges in conducting wires. They are used in radio and television communication systems.”
Infrared Waves – “… Infrared lamps are used in physical therapy.”
Ultraviolet Rays – “… The sun is an important source of ultraviolet light. But fortunately, most of it is absorbed in the ozone layer in the atmosphere at an altitude of about 40 – 50 km.”
X-Rays – “… X-rays are used as a diagnostic tool in medicine and as a treatment for certain forms of cancer.”