✓ Board-verified
Physics · 2024 · 3 marks
CBSE 2024 · Region 5 · Set 1 · Q26
(a) Name the parts of the electromagnetic spectrum which are (i) also known as 'heat waves' and (ii) absorbed by ozone layer in the atmosphere. (b)…
(a)
Name the parts of the electromagnetic spectrum which are (i) also known as 'heat waves' and (ii) absorbed by ozone layer in the atmosphere.
(b)
Write briefly one method each, of the production and detection of these radiations.
Marking-scheme solution
(a)(i)
Infrared waves
(ii)
Ultraviolet rays
(b)
Method of production:
Infrared waves: hot bodies / vibration of atoms and molecules
Ultraviolet rays: special UV lamps / Sun / very hot bodies
Method of detection:
Infrared waves: thermopiles / IR photographic film / bolometer
Ultraviolet rays: photocells / photographic film
All Electromagnetic Waves questions2024 question paperNCERT solutions: Electromagnetic WavesPractice Electromagnetic Waves →
More from Electromagnetic Waves
- The ratio of amplitude of electric field to the amplitude of the magnetic field associated with an electromagnetic wave propagating in glass (n=1 ·…2026
- The magnetic field in a plane electromagnetic wave travelling in glass (n=1 · 5) is given by B_y=(2 × 10^-7 T) sin (α x+1 · 5 × 10^11 t) where x is…2026
- What are infrared waves? Why are these waves referred to as 'heat waves'? Give any two uses of these waves.2026
- Differentiate between conduction current and displacement current. A capacitor is connected across a source providing time-dependent current. Explain…2026
- Which one of the following has the highest frequency?2024
- The electromagnetic waves used in radar systems are:2023
- What are microwaves? How are they produced? Give any two uses of microwaves.2026
- Which one of the following electromagnetic radiation has the least wavelength?2023
CBSE Class 12 Physics past-paper question from the 2024 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.