Physics
The waves used for taking photographs at night are :
- infrared waves
- microwaves
- radio waves
- ultrasonic waves
Spectrum
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Answer
infrared waves
Reason — Infrared rays due to longer wavelength can penetrate darkness better than visible light, allowing cameras equipped with infrared sensors to capture images even in very low light conditions.
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Related Questions
For obtaining the spectrum of infrared radiation, the material of prism should be :
- glass
- quartz
- rock salt
- does not matter
The most energetic electromagnetic radiations are —
- microwaves
- ultraviolet waves
- X-rays
- gamma rays
The radiation used for satellite communication is :
- microwaves
- radio waves
- gamma rays
- X-rays
Column X shows the kinds of electromagnetic waves and column Y shows their applications.
Column X Column Y (A) Infrared rays (i) in remote-controlled gadgets (B) Radio waves (ii) for transmission (C) X-rays (iii) for detection of bone fractures (D) Ultraviolet rays (iv) absorption by atmospheric ozone layer Choose the correct pairing :
- A - (i), B - (ii), C - (iii), D - (iv)
- A - (iv), B - (iii), C - (ii), D - (i)
- A - (i), B - (ii), C - (iv), D - (iii)
- A - (iii), B - (ii), C - (i), D - (iv)