What are the main differences between the incoming radiation from the sun and the outgoing radiation from the earth? What is it about the sun and the earth that determines these differences in radiation?

Q: At the beach, you can get a sunburn while under the shade of an umbrella. Explain the statement?

A: Sun burn is a radiation that affects the tissues upon over exposure to UV rays.

Q: Answer the following questions: (i) Why is the thin ozone layer on top of the stratosphere crucial…

A: (i) The thin ozone layer on the top of the stratosphere is important for human survival. They…

Q: An object that is colder than its surroundings will continue to absorb electromagnetic radiation…

A: The fundamental concept is:- Initially the object is absorbing radiations and simultaneously…

Q: Of the electromagnetic radiation ranges listed, which two have the highest frequencies?   Question…

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Q: Name two sources of each of infrared radiations and ultraviolet radiations.

A: One of the primary sources of infrared radiation is the heat or thermal radiation. IR rays are…

Q: Why are infrared waves often called heat waves?

A:

Q: Global Radiation is Select one: a. Direct Radiation x Diffuse Radiation. b. Direct Radiation /…

A: The total short wave radiation falling on a horizontal surface from the sky is called Global…

Q: what is the frequency of an electromagnetic wave that has a wavelength of 300,000 km

A:

Q: What is the relationship between the radiation intensity and the distance of the source?

A: Intensity obeys inverse square law ie intensity of radiation varies inversely with the square of…

Q: What is the intensity of the radiation emitted by a hot skyscraper in Dubai (350 K) relative to that…

A: Given data Temperature of the body in Dubai, TD=350 K Temperature of the body in Cusco, TC=250 K The…

Q: What are the types of electromagnetic radiation?

A: Given:  Electromagnetic waves

Q: How would the intensity of sunlight at Earth's surface change if Earth were 2.5 times farther from…

A: The intensity of sunlight at Earth's surface is determined by the inverse square law, which states…

Q: In 2004, when Mercury passed between the Sun and Earth, sunlight was not appreciably bent as it…

A: Mercury ids the closest planet to the Sun in our solar system.

Q: When you look at a shirt and it is blue…. WHY IS IT BLUE? What is being absorbed and what is being…

A: What colour our eye see is the reflected colour which an object reflects. Rest of the colours are…

Q: List the types of electromagnetic radiation in the order of decreasing energy or increasing…

A: In physics, the electromagnetic radiation are the waves propagating through the space having time…

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.