The colorful display of lights in the upper atmosphere seen in higher and lower latitudes are called auroras. What causes them?   a. the response of the earth’s magnetic field to solar flares b. solar radiation and particles ionize the gas molecules in that portion of the atmosphere c. the circulation of the earth’s outer core   d. highly energetic particles coming from outer space glow as they enter our atmosphere

Q: Which part of the EM spectrum has the greatest period?   A. radio   B. ultraviolet   C. x-ray…

A: The speed of the electromagnetic wave is constant. Thus, the product of frequency and wavelength is…

Q: The visible surface of the sun is the a. corona b. chromosphere c. photosphere

A: The  visible surface of the sun is the Photosphere.  Explanation :…

Q: Why are measurements of the Sun's 10.7 cm radio emission used to monitor the state of the solar…

A: A. It provides a repeatable, objective measurement of solar activity. B. It serves as a good proxy…

Q: Which of the following types of light have a wavelength greater than that of visible light?  I.…

A: There are various type of EM waves. All these waves have different types of wavelengths. The waves…

Q: Which of the following are characteristic of ultraviolet radiation from a star?   a. It will not…

A: Ultraviolet radiation comes from a hotter region of the electromagnetic spectrum than visible light.

Q: In which portion of the spectrum is the 21-centimeter radiation emitted?   a. infrared   b.…

A:

Q: a. emits green light. b. absorbs green light. C. transmits green light. d. reflects green light.

A: d) Apple is green because it REFLECTS GREEN LIGHTS ( and absorb all other lights)

Q: Wearing black clothes in the summer makes the person wearing it feel warmer than if they were…

A: Wearing black clothes in the summer makes the person wearing it feel warmer than if they were…

Q: zone

A: To choose : The layer of sun in which the nuclear fusion takes place.

Q: Why do radar satellites typically use a sun-synchronous, dawn-dusk orbit? A. To optimize the…

A: Explanation:  Radar satellites typically use a sun-synchronous, dawn-dusk orbit to maintain a…

Q: Kittel, Ch4-5. Surface temperature of the Earth. Calculate the temperature of the surface of the…

A:

Q: Space-based telescopes are needed to observe electromagnetic energy that cannot reach the surface of…

A: Introduction: Some types of electromagnetic radiation easily pass through the atmosphere, while…

Q: Which of the following physical phenomena does not contribute to the auroras of the earth in the…

A: in arctic and antarctic we see spectacular beatiful colourful and beautiful night.Energized…

Q: Ozone in Earth's upper atomsphere is most helpful in absorbing potentially damaging a. ultraviolet…

A: Ozone in Earth's upper atomosphere is most helpful in absorbing potentially damaging ultraviolet…

Q: Which of the following is most likely to yield evidence to support one of the models of the future…

A: Required : Which of the following is most likely to yield evidence to support one of the models of…

Q: How are neutrinos observed?   a. by using a large tank of cleaning fluid buried deep in beneath…

A: Neutrino was first Proposed by Pauli to explain the conservation principle in the process of beta…

Q: The sunspot cycle affects   I. the latitude at which sunspots are visible at a given time.   II.…

A: The sunspot cycle affects I. the latitude at which sunspots are visible at a given time. II. the…

Q: 10. What is the approximate speed of light (EM radiation)? a. 1 billion feet per second b. 1…

A: The speed of light is about 300000000 m/s or 3×108 m/s.

Q: The wavelengths of visible light range from approximately 400 nanometers to 750 nanometers. a.…

A:

Q: Describe the concept of “sphere of influence” and how it is estimated. b. Calculate the SOI for the…

A: (a) Introduction: A sphere of influence is the oblate-shaped region around a celestial body where…

Q: Planets around stars other than the sun have recently been discovered by: *   A. The variation in…

A: Planets around other stars are being discovered by transit method in which the astrometric motion of…

Q: Which of the following explain why far infrared astronomy must be done from high-flying aircraft?…

A: Far infrared astronomy is a branch of astronomy which deals with the objects that are visible in…

Q: A high-altitude airplane is used to make observations

A: There is a vast range of electromagnetic radiation carrying information about universe strikes the…

Q: A helium flash   a. is sudden and powerful.   b. destroys the star.   c. is a slow expulsion of…

A: Introduction: A helium flash is a very brief thermal runaway nuclear fusion of large quantities of…

Q: Comparing two different types of electromagnetic waves, infrared and ultraviolet, we can say thatA.…

A: The increasing order of the wavelength of the electromagnetic waves.  gamma rays  X rays  U . V.…

Q: star that is moving toward Earth will   a. have its spectral lines shifted to the red.   b. have…

A:

Special Relativity

The theory of special relativity discusses how space and time are related to objects traveling along a straight line at a constant speed. Simply stated, as an object reaches the speed of light, its mass becomes infinite and it is unable to move faster than light. This interstellar speed limit has been the topic of much debate in astronomy, and also in science fiction when people consider how to fly over large distances.