The difficulty in detecting gravitational waves stems from their weak coupling to matter. This means they cause only tiny distortions (strains) in spacetime as they pass through. Even waves from catastrophic events like black hole mergers result in strains of only about 10⁻²¹ to 10⁻²². Detecting such minuscule changes requires extraordinarily sensitive instruments, isolated from environmental noise. The energy carried by the waves, while immense near the source, spreads out over vast cosmic distances, leading to extremely low energy flux at the detector.
The characteristics of gravitational waves that make them difficult to detect are
Asked in UPSC Geoscientist 2022 · Topic: Wave Motion (Electromagnetic Waves: Properties, Electromagnetic Spectrum, Energy and Momentum)
More Physics questions
- At a given point in space, the electric field associated with an electromagnetic wave is given by $\vec{E} = (2\hat{i} - 1.5\hat{j})e^{i[k_0(3x+4y)-\omega t]}$. At the same point, which one among the following is the correct value of the unit vector $(\hat{B})$ of the magnetic field associated with this electromagnetic wave ?
- Which one of the following sequences of electromagnetic spectrum is correct in terms of ascending wavelength order ?
- Which of the following pairs are correctly matched? 1. X-rays – Used to scan bags in airports 2. Gamma rays – Used in radiotherapy for treatment of cancer and Tumor 3. Radio waves – Used in Night vision cameras 4. Visible Waves – We can see around the world
- Which one of the following does a TV remote control unit use to operate a TV set ?
- Arrange the following electromagnetic waves according to the increasing frequency : (1) Gamma rays (2) X-rays (3) Radio waves (4) Microwaves
- There are many different regions to the electromagnetic spectrum. These include A. visible light B. gamma-rays C. infra-red D. micro- waves E. radio-waves F. ultra-violet, and G. X- rays. Put them in order of increasing wavelength, starting with the shortest wavelength first.
- Microwaves are electromagnetic waves having frequencies in range of
- The velocity of radio waves is _____