emit visible light. … D) reflect visible light. Without telescopes or other aid, we can look up and see the Moon in the night sky because it. A) emits visible light.
Also Which of the following best describes why we say that light is an electromagnetic wave quizlet?
Which of the following best describes why we say that light is an electromagnetic wave? The passage of a light wave can cause electrically charged particles to move up and down. … The passage of a light wave can cause electrically charged particles to move up and down.
Subsequently, What is the purpose of interferometry? What is the purpose of interferometry? It allows two or more small telescopes to achieve the angular resolution of a much larger telescope.
What is the purpose of adaptive optics? Adaptive optics allows the corrected optical system to observe finer details of much fainter astronomical objects than is otherwise possible from the ground. Adaptive optics requires a fairly bright reference star that is very close to the object under study.
Why do astronomers need different telescope designs to observe across the electromagnetic spectrum?
Why do astronomers need different telescope designs to observe across the electromagnetic spectrum? … Telescopes have to adapt to the greater distortion of the atmosphere at shorter wavelengths. C) Photons of different energy behave differently and require different collection strategies.
Which of the following describes the light that can be detected from a person quizlet?
Which of the following describes light that can be detected from a person? The person reflects many wavelengths of visible light and emits a continuum of wavelengths of infrared light.
When light reflects off an object What is the relation between the angle of incidence?
The angle of reflection is equal to the angle of incidence. Both angles are measured from the normal. The normal is an imaginary line at right angles to the plane mirror.
How are wavelength frequency and energy related for photons of light group of answer choices?
E) equal to the speed of the wave times the wave’s frequency. How are wavelength, frequency, and energy related for photons of light? A) Longer wavelength means lower frequency and lower energy.
What is meant by interferometry?
‘Interferometry’ is a measurement method using the phenomenon of interference of waves (usually light, radio or sound waves). … In addition, interferometry is used to describe the techniques that use light waves for the study of changes in displacement.
What is interferometry and how does it aid astronomers?
Interferometry (in this case “astronomical interferometry”) is a technique that astronomers use to obtain the resolution of a large telescope by using multiple smaller telescopes.
What does the technique of interferometry allow?
What does the technique of interferometry allow? It allows two or more telescopes to obtain the angular resolution of a single telescope much larger than any of the individual telescopes. … The angular resolution of a telescope is never less than its diffraction limit.
What is the purpose of adaptive optics astronomy quizlet?
What is the purpose of adaptive optics? It is a special technology that allows the Hubble Space Telescope to adapt to study many different types of astronomical objects. It allows ground-based telescopes to observe ultraviolet light that normally does not penetrate the atmosphere.
What problem does adaptive optics solve?
What is Adaptive Optics? As light from distant celestial objects enters our atmosphere it gets disturbed by our ever-moving atmosphere. Adaptive optics (AO) corrects for the distortions in an image caused by this atmospheric turbulence.
What is adaptive optics quizlet?
Adaptive Optics. Primary telescope mirrors that are continuously and automatically adjusted to compensate for the distortion of starlight due to the motion of Earth’s atmosphere. Angular Resolution. The angular size of the smallest detail of an astronomical object that can be distinguished with a telescope.
What telescope feature is most important to astronomers?
The ability of a telescope to collect a lot more light than the human eye, its light-gathering power, is probably its most important feature. The telescope acts as a “light bucket”, collecting all of the photons that come down on it from a far away object.
What is the best reason to put a visible light telescope in space instead of on the ground?
The main reason we put telescopes into space is to get around the Earth’s atmosphere so that we can get a clearer view of the planets, stars, and galaxies that we are studying. Our atmosphere acts like a protective blanket letting only some light through while blocking others.
What is the best reason to put a visible light telescope in space instead of on the ground quizlet?
What is the best reason to put a visible-light telescope in space instead of on the ground? The telescope is above the atmosphere so the light does not get distorted by turbulent air. What does the technique of interferometry allow?
Which of the following best describes the light that can be detected from a person?
Which of the following describes the light that can be detected from a person? The person reflects many wavelengths of visible light and emits a continuum of wavelengths of infrared light.
Which forms of light are lower in energy and frequency than the light that human eyes can see?
Red has the lowest energy and violet the highest. Beyond red and violet are many other kinds of light our human eyes can’t see, much like there are sounds our ears can’t hear. On one end of the electromagnetic spectrum are radio waves, which have wavelengths billions of times longer than those of visible light.
What type of light dominates what we see in a planet when we observe in the infrared?
As we enter the near-infrared region, the hot blue stars seen clearly in visible light fade out and cooler stars come into view. Large red giant stars and low mass red dwarfs dominate in the near-infrared.
What is the angle between the incident and reflected rays when a ray of light is incident normally on a plane mirror?
Here, the a ray of light is incident normally on a plane mirror. The reflected ray will trace back the incident ray due to the law of reflection. As a result, the angle between incident and the reflected ray will be 0 degrees.
What is the relationship between the angle of incidence and the angle of refraction?
The law of refraction, also known as Snell’s law, describes the relationship between the angle of incidence (θ1) and the angle of refraction (θ2), measured with respect to the normal (“perpendicular line”) to the surface, in mathematical terms: n1 sin θ1 = n2 sin θ2, where n1 and n2 are the index of refraction of the …
What will happen to the angle of reflection when the angle of incidence is increased?
As the angle is increased to greater and greater angles, we would begin to observe less refraction and more reflection. That is, as the angle of incidence is increased, the brightness of the refracted ray decreases and the brightness of the reflected ray increases.