FOREST BIOMETRICS UPDATED COMPLETE
QUESTIONS AND ANSWERS VERIFIED PREP
MATERIAL
●● How does remote sensing differ from direct measurement?
Answer: Remote sensing is a non-contact, indirect method, while direct
measurement requires the sensor to be 'in place'.
●● What types of questions can remote sensing answer?
Answer: Examples include land-use change, air quality, and visible-
image interpretation.
●● What are radio waves?
Answer: The lowest energy, longest wavelength part of the
electromagnetic spectrum, used for communications like radio and TV
broadcasting.
●● What are microwaves used for?
Answer: Used in microwave ovens, Wi-Fi, and radar.
●● What is infrared (IR) radiation?
Answer: Felt as heat, emitted by warm objects, used in remote controls,
and to study cosmic dust.
,●● What is visible light?
Answer: The only part of the spectrum detectable by the human eye,
ranging from red (longer) to violet (shorter).
●● What is ultraviolet (UV) radiation?
Answer: Higher energy than visible light, causes sunburns, and is used
in sterilization.
●● What are X-rays?
Answer: High-energy waves that pass through soft tissue but are blocked
by denser materials like bone.
●● What are gamma rays?
Answer: The highest energy, shortest wavelength radiation, produced by
nuclear reactions and cosmic events.
●● What was the first aerial photograph taken from?
Answer: A balloon.
●● What is aerial photography a form of?
Answer: Remote sensing.
, ●● How were film canisters from the CORONA satellites retrieved?
Answer: They were pulled from the air by planes.
●● How often does the private company Planet take high-resolution
photographs of the entire Earth?
Answer: Every day.
●● What is an advantage of using drones for aerial photography?
Answer: They are inexpensive.
●● What is passive remote sensing?
Answer: Satellite detects natural energy (like from the sun) without
emitting anything.
●● What is active remote sensing?
Answer: Satellite emits radiation and detects the energy reflected off the
Earth.
●● What are atmospheric windows?
Answer: Specific wavelength ranges in the electromagnetic spectrum
that pass through Earth's atmosphere without significant absorption or
scattering.
QUESTIONS AND ANSWERS VERIFIED PREP
MATERIAL
●● How does remote sensing differ from direct measurement?
Answer: Remote sensing is a non-contact, indirect method, while direct
measurement requires the sensor to be 'in place'.
●● What types of questions can remote sensing answer?
Answer: Examples include land-use change, air quality, and visible-
image interpretation.
●● What are radio waves?
Answer: The lowest energy, longest wavelength part of the
electromagnetic spectrum, used for communications like radio and TV
broadcasting.
●● What are microwaves used for?
Answer: Used in microwave ovens, Wi-Fi, and radar.
●● What is infrared (IR) radiation?
Answer: Felt as heat, emitted by warm objects, used in remote controls,
and to study cosmic dust.
,●● What is visible light?
Answer: The only part of the spectrum detectable by the human eye,
ranging from red (longer) to violet (shorter).
●● What is ultraviolet (UV) radiation?
Answer: Higher energy than visible light, causes sunburns, and is used
in sterilization.
●● What are X-rays?
Answer: High-energy waves that pass through soft tissue but are blocked
by denser materials like bone.
●● What are gamma rays?
Answer: The highest energy, shortest wavelength radiation, produced by
nuclear reactions and cosmic events.
●● What was the first aerial photograph taken from?
Answer: A balloon.
●● What is aerial photography a form of?
Answer: Remote sensing.
, ●● How were film canisters from the CORONA satellites retrieved?
Answer: They were pulled from the air by planes.
●● How often does the private company Planet take high-resolution
photographs of the entire Earth?
Answer: Every day.
●● What is an advantage of using drones for aerial photography?
Answer: They are inexpensive.
●● What is passive remote sensing?
Answer: Satellite detects natural energy (like from the sun) without
emitting anything.
●● What is active remote sensing?
Answer: Satellite emits radiation and detects the energy reflected off the
Earth.
●● What are atmospheric windows?
Answer: Specific wavelength ranges in the electromagnetic spectrum
that pass through Earth's atmosphere without significant absorption or
scattering.
