What is the shape of the wavefront on earth for sunlight?

Q: Ultraviolet bulbs have a quartz envelope instead of glass?

A:

Q: common units for wavelength of visible light?

A: Wavelength is defined as  distance between corresponding points of two consecutive waves.

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: The ____________ is the most important layer of the ionosphere for refracting HF radio wave and at…

A: Ionisation is the process in which electrically charged and neutral atoms and molecules gain or lose…

Q: Why is the color of the clear sky is blue?

A:

Q: How are Ultraviolet waves produced?

A: Ultraviolet radiation is generated naturally from the Sun and artificial sources such as…

Q: Why do you think that ultraviolet radiation causes a suntan, whereas infrared radiation does not?

A: Ultraviolet radiation is a type of electromagnetic radiation. Frequency range of ultraviolet…

Q: How are Infrared waves produced?

A: Infrared rays are produced by hot bodies. Not only hot bodies but black body radiations from all…

Q: How is a radio wave transmitted?

A:

Q: The sky appears to be blue during the day because: 1. Air absorbs blue light less than other…

A: The sky appears to be blue during the day.

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: 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: Why will an infrared photon have less energy than an ultraviolet photon?

A: "Since all questions are different as per bartleby guideline we can author only first one please…

Q: Why do you think that ultraviolet radiation causes a suntan whereas infrared radiation dies not?

A: The ultraviolet rays are damaging because they can cause damage to skin cells. It can cause…

Q: Choose the BEST answer to the following: The color of light most intense in the solar radiation…

A: Solar radiation is electromagnetic radiation ranging from about 0.25 to 0.45 micro meters in…

Q: Who was the first person to obtain the spectrum of sunlight?

A: In 1666, Sir Issac Newton performed prism experiment to obtain the spectrum of sunlight. In his…

Q: What is the effect on the color of a cloud when it contains an abundance of large droplets?

A: The sunlight scattering the droplets in absorb most of the light.

Q: Why is sunset red? Group of answer choices Psychology. The Sun itself turns redder at sunset. Blue…

A: Answer-: blue light is scattered away.

Q: What is the complete mixture of all of the color wavelengths that make up the visible spectrum?

A: The visible light spectrum is the section of the electromagnetic radiation spectrum that is visible…

Q: What is the range of visible light?

A: range of visible light

Q: Why does the Sun appear reddish early in the morning?

A: When sun rises, the rays coming from the Sun have to travel a large distance in earth’s atmosphere…

Q: Why is the sky a darker blue when you are at high altitudes? (Hint: What color is the “sky” on the…

A: The color of sky is actually black, and in the morning due to scattering of sunlight we see a bluish…

Q: Give a list of atleast five radiations in order of their increasing wavelengths.

A: If a radiation have highest wavelength, then its frequency is lowest.

Q: About how much of the measured electromagnetic spectrum does light occupy?

A: An electromagnetic spectrum consists of wise range of waves.  Gamma Rays, X rays, Ultraviolet rays,…

Q: What is radiation spectrum?

A: The entire range of electromagnetic radiation, including  radio waves, microwaves, infrared…

Q: Solar Zenith Angle at Nordlysstosjonen 60 Daylight 80 100 Evening/Nighttime 120 Maxima Midnight…

A: Angle between the sun's ray and vertical direction create an angle known as Solar Zenith Angle

Q: What is the frequency of infrared light of 1.0*10^-4 wavelength?

A:

Q: Which have shorter wavelengths, ultraviolet or infrared? Which has the higher frequencies?

A: Ultra-violet radiation has shorter wavelength. They have a wave length range of 1 nm to 400 nm…

Q: Name two dangers of visible light?

A: The visible light is a part of electromagnetic radiation. The wavelength range is 400 nm to 700 nm.…

Q: Define the term Doppler effect?

A: The difference in frequency of a sound wave with respect to an observer nearly to the wave source…

Q: why does the colour of sunset vary from day to day?

A: The colour of sky is actually the result of scattering of light by the micro particles in the…

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.