Match the LIST-I with LIST-II
| LIST-I (Electromagnetic waves) | LIST-II (Uses) |
| A. Ultra-violet rays | I. Aircraft navigation for radar system |
| B. X-rays | II. In eye surgery |
| C. Microwaves | III. Remote control of T.V. |
| D. Infrared waves | IV. For detection of fractures |
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → A - II, B - IV, C - I, D - III
Each use depends on how that part of the electromagnetic spectrum interacts with matter.
(A) Ultra-violet rays — this matches (II) In eye surgery. Focused UV lasers are used in LASIK eye surgery to reshape the cornea.
(B) X-rays — this matches (IV) For detection of fractures. X-rays pass through soft tissue but are absorbed by bone, so a break shows up on the image.
(C) Microwaves — this matches (I) Aircraft navigation for radar system. Their short wavelength lets them travel in narrow beams and reflect off aircraft, which is the basis of radar.
(D) Infrared waves — this matches (III) Remote control of T.V. TV remotes send coded pulses of infrared light from an LED.
NCERT (2026-27):
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.”
Microwaves – “… Due to their short wavelengths, they are suitable for the radar systems used in aircraft navigation.”
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.”