Match List-I with List-II.
| List-I | List-II | ||
| (A) | Gamma rays | (I) | To detect fracture of bones |
| (B) | X-rays | (II) | Used in remote switches of household electronic systems |
| (C) | Ultraviolet rays | (III) | Chemotherapy |
| (D) | Infrared waves | (IV) | Eye surgery |
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → (A)-(III), (B)-(I), (C)-(IV), (D)-(II)
Each band of the electromagnetic spectrum has its uses, decided by its energy and by how it interacts with matter.
(A) Gamma rays — this matches (III) Chemotherapy. Gamma rays carry the highest energy and are used to destroy cancer cells in the treatment of cancer.
(B) X-rays — this matches (I) To detect fracture of bones. X-rays pass through soft tissue but are absorbed by bone, so a fracture shows up on the X-ray image.
(C) Ultraviolet rays — this matches (IV) Eye surgery. Focused UV beams from lasers are used in LASIK eye surgery, because UV light can be focused into very narrow beams.
(D) Infrared waves — this matches (II) Used in remote switches of household electronic systems. TV and AC remote controls send their signals by infrared light-emitting diodes.
NCERT (2026-27):
Infrared Waves – “… Electronic devices (for example semiconductor light emitting diodes) also emit infrared and are widely used in the remote switches of household electronic systems such as TV sets, video recorders and hi-fi systems.”
Ultraviolet Rays – “… Due to its shorter wavelengths, UV radiations can be focussed into very narrow beams for high precision applications such as LASIK (Laser- assisted in situ keratomileusis) eye surgery.”
X-Rays – “… X-rays are used as a diagnostic tool in medicine and as a treatment for certain forms of cancer.”
Gamma Rays – “… They are used in medicine to destroy cancer cells.”