Electromagnetic Energy in Remote Sensing

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Questions and Answers

What is a key characteristic of electromagnetic energy related to its wave nature?

  • Speed of light travel
  • Quantization in discrete packets
  • Ability to undergo interference and diffraction (correct)
  • Constant speed for all wavelengths

Which property defines the speed at which electromagnetic waves travel?

  • Wave nature
  • Quantization
  • Spectrum
  • Constant speed for all wavelengths (correct)

What is quantized in discrete packets in electromagnetic energy?

  • Speed of light
  • Frequency
  • Energy (correct)
  • Wave nature

How does the energy of a photon relate to its frequency in electromagnetic energy?

<p>Energy is directly proportional to frequency (B)</p> Signup and view all the answers

Which of the following is NOT part of the electromagnetic spectrum?

<p>Sound waves (C)</p> Signup and view all the answers

What are the key components of electromagnetic waves that oscillate perpendicular to each other and to the direction of propagation?

<p>Electric and magnetic fields (C)</p> Signup and view all the answers

What is the range of wavelengths that can be detected by the human eye?

<p>380 to 750 nanometers (A)</p> Signup and view all the answers

Which type of radiation is often associated with sunburn and sterilization?

<p>Ultraviolet (UV) (A)</p> Signup and view all the answers

What is a key application of X-rays mentioned in the text?

<p>Medical imaging (B)</p> Signup and view all the answers

Which type of radiation is often associated with nuclear processes?

<p>Gamma rays (D)</p> Signup and view all the answers

Why is understanding the electromagnetic spectrum crucial in various scientific and technological fields?

<p>To gain unique capabilities for specific applications (D)</p> Signup and view all the answers

What is black body radiation referred to in terms of emitted electromagnetic radiation?

<p>Radiation emitted by a perfect black body (B)</p> Signup and view all the answers

What is the main focus of Snell's Law?

<p>Explaining wave propagation through different media (B)</p> Signup and view all the answers

According to Huygens' Principle, what serves as a source of secondary spherical wavelets?

<p>Constant points on a wavefront (D)</p> Signup and view all the answers

What does Faraday's Law of Electromagnetic Induction describe?

<p>The induction of voltage due to a changing magnetic field (B)</p> Signup and view all the answers

How does the Lorentz Force Law describe the force experienced by a charged particle?

<p>Incorporating both electric and magnetic forces (D)</p> Signup and view all the answers

Remote sensing atmospheric effects refer to which interactions?

<p>Interactions between Earth's atmosphere and radiation during sensing (A)</p> Signup and view all the answers

Which of the following accurately describes the purpose of Huygens' Principle?

<p>Explaining wave propagation using secondary wavelets (C)</p> Signup and view all the answers

What is the purpose of GOES satellites in geostationary orbit?

<p>Continuous monitoring of weather patterns and environmental events over specific regions (D)</p> Signup and view all the answers

At what altitude do Aqua and Terra satellites operate?

<p>705 kilometers (C)</p> Signup and view all the answers

What is the purpose of the Hubble Space Telescope in low Earth orbit?

<p>Observes distant celestial objects across various wavelengths (D)</p> Signup and view all the answers

What is the function of GPS satellites in medium Earth orbit?

<p>Providing precise location and timing information for navigation (C)</p> Signup and view all the answers

Where does the International Space Station (ISS) orbit?

<p>Approximately 420 kilometers above Earth (A)</p> Signup and view all the answers

What type of data do MODIS instruments on Aqua and Terra satellites provide?

<p>Global data for climate studies, land cover monitoring, and atmospheric observations (B)</p> Signup and view all the answers

When was the IRS-1B satellite, part of the IRS-2 series, launched?

<p>August 29, 1991 (D)</p> Signup and view all the answers

What was the main purpose of the IRS-P3 satellite launched on March 21, 1996?

<p>Resource monitoring (C)</p> Signup and view all the answers

Which satellite marked the beginning of India's Earth observation program?

<p>IRS-1 (B)</p> Signup and view all the answers

What distinguishes the Cartosat satellites in terms of their purpose?

<p>High-resolution cartographic applications (A)</p> Signup and view all the answers

When was the Resourcesat-1 satellite launched?

<p>April 17, 2003 (C)</p> Signup and view all the answers

What feature distinguishes the IRS-3 series from its predecessors?

<p>Enhanced sensors for higher resolution imaging (B)</p> Signup and view all the answers

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