In 2004, when Mercury passed between the Sun and Earth, sunlight was not appreciably bent as it passed Mercury. Why?

Q: 7.39 At its closest approach, Mercury is 77.3 million km from Earth. How long would it take to send…

A:

Q: Why is the sky blue during fair day and why is it red during sunset?

A: This things happen due to the phenomenon scattering of light.

Q: What will happen to the object which will be less denser than water? more denser than water?

A: Step 1Density is defined as mass possessed by an object in a specified volume.

Q: You have scored a great internship with NASA, working on planning for an upcoming mission to Mars.…

A: Given: The mass of the carbon dioxide = 1.09 kg,             the mole number of carbon dioxide = 1…

Q: uppose we place a circular, perfectly reflective mirror in orbit around the Earth. It has a mass of…

A:

Q: How long does it take, in minutes, for light to reach Mars from the Sun, a distance of 2.477×108 km?

A:

Q: 16. Suppose a spacecraft travels at a speed approaching the speed of light. How would the length of…

A:

Q: Why are we able to see the moon? * O reflects the sun's light O makes its own light O glows in the…

A: Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: Determine the wavelength of the maximum amount of radiation emitted by surface at 49 °C. Express…

A: Power = 100 W surface temperature (T) = 49o C = 322 K

Q: Suppose a radio signal travels from Earth and through space at a speed of 3.0 × 10° m/s. How far…

A: Given, v=3.0×108m/st=23.7min=1.4×103sec

Q: When the Mars rover Sojourner was deployed on thesurface of Mars in July 1997, radio signals took…

A: Given: The time taken by radio signals is t = 12 min = 720 s.

Q: More than 200 years later, Albert A. Michelson sent a beam of light from a revolving mirror to a…

A: Given:  distance,d = 15 km = 15000 m  speed,c = 3 x 108 m/s

Q: Why are the convection and the radiation resistances at a surface in parallel instead of being in…

A: As the heat transfer occurs simultaneously for convection and radiation process, the convection and…

Q: When a light beam approaches you, its frequency is higher, and its wavelength is shorter. Does this…

A: SOlution: When a light beam approaches you, its frequency is higher, and its wavelength is shorter.…

Q: For a blackbody object of given volume, which shape will it emit the least radiation? Why?

A:

Q: Why are infrared waves often called heat waves?

A:

Q: When a flashing light source approaches you, does the speed of light or the frequency of light—or…

A:

Q: Manuel is scuba diving near a school of fish at a depth of −9.5 feet relative to sea level. Then he…

A:

Q: If the speed of light is still faster than sound but not constant, what will happen to reality?

A: if speed of light is still faster than sound but not constant, (it means the speed of light changes…

Q: needed to leave a

A:

Q: Light travels in __________   a. one direction b. two directions c. three directions d. four…

A: Light travel in a straight line. Travel in one direction. Option a is correct.

Q: Approximately how long would it take a radio signal to reach the International Space Station (ISS)…

A:

Q: Give some practical application of EM waves?

A: Waves formed as a result of vibrations between an electric and magnetic field are electromagnetic…

Q: hat happens when you "see" something? Something exits your eye but it isn't light. Light exits your…

A: Required : What happens when you "see" something?

Q: If the wavelength of light is halved, by what fraction does the amount of the light scattered by…

A: Write the expression for the intensity of the light by Rayleigh’s law of scattering. I∝1λ4

Q: Atmospheric pressure on Mars is 600 Pa. The gravitational acceleration of Mars is 0.40 times that…

A: Atmospheric pressure (P) = 600 Pa acceleration due to gravity (g) on mars = 0.4 times gearth depth…

Q: With the sun directly​ overhead, an airplane takes off at a speed S of 235 mph at an angle θ of 17°…

A: Given  Speed of the airplane is v=235 mph Angle of the airplane with the horizontal is θ=17°   We…

Q: Find the total radiation incident on an extraterrestrial horizontal surface at May 1 for location…

A: Day = May 1 Location = 37°N Time = 10:40 am

Q: Approximately how long would it take a telephone signal to travel 5.46 x 10^10 m from Earth to Mars…

A: A telephone signal is transmitted from one place to the other place with the help of an…

Q: The speed of light is faster through a substance with an index of refraction of 1.2 versus a…

A: Given Information:- Refractive index of the first substance is n1=1.2 Refractive index of the second…

Q: A high energy electron enters earth’s atmosphere from space and comes straight down toward a spot on…

A:

Q: If you were an observer on Mars looking at the earth through a telescope would you see the earth…

A: To find: If you were an observer on Mars looking at the earth through a telescope would you see…

Q: What is true of the sun? It attracts light waves passing nearby. It has no effect on light waves…

A:

Q: Light does bend in a gravitational field. Why is this bending not taken into consideration by…

A: Light bends in gravitational field .But the gravitational field should be strong enough to notice…

Q: An observer watching sailing ship at sea notes that the ship appears to be sinking as it moves…

A: This observation best explain with :    As ship is moving away from observer it appears to sink is…

Q: Why will body emit more radiation under similar conditions, a black body or a polished body?

A: According to the Stefan-Boltzmann law, the energy radiated is

Q: Why does a body emit radiations of all wavelengths and not for a particular wavelength?

A: Wavelength – When we consider a point on a single wave, then the measurement of the distance between…

Q: Light changes its energy when it “falls” in a gravitational field. This change in energy is not…

A: When the beam of photons or light falls inside the region where the gravitational field is active,…

Q: Why are infrared rays often called heat waves?

A: When infrared rays fall on object, they cause entire atoms and molecules to vibrate. And due to…

Q: The sun is almost 400 times farther from Earth than is the moon. How long does light from the moon…

A: Given:Speed of the light = 3 X 108 m/sDistance between the moon and the earth = Distance between the…

Q: When yellow light is compared with ultraviolet light, a) both have the same frequency. b) both…

A: Option -b

Stellar evolution

We may see thousands of stars in the dark sky. Our universe consists of billions of stars. Stars may appear tiny to us but they are huge balls of gasses. Sun is a star of average size. Some stars are even a thousand times larger than the sun. The stars do not exist forever they have a certain lifetime. The life span of the sun is about 10 billion years. The star undergoes various changes during its lifetime, this process is called stellar evolution. The structure of the sun-like star is shown below.

Red Shift

It is an astronomical phenomenon. In this phenomenon, increase in wavelength with corresponding decrease in photon energy and frequency of radiation of light. It is the displacement of spectrum of any kind of astronomical object to the longer wavelengths (red) side.