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2021-05-14

How do scientists determine the age of stars?

How do scientists determine the age of stars?

Essentially, astronomers determine the age of stars by observing their spectrum, luminosity and motion through space. They use this information to get a star’s profile, and then they compare the star to models that show what stars should look like at various points of their evolution.

How do scientists determine the composition and temperature of stars?

The most common method astronomers use to determine the composition of stars, planets, and other objects is spectroscopy. Today, this process uses instruments with a grating that spreads out the light from an object by wavelength. This spread-out light is called a spectrum.

How is the light from a star used to determine the chemical composition of stars?

Through the refraction of light by a prism or through its diffraction by a diffraction grating, the light from a source is spread out into its different visual wavelengths, from red to blue. Because each element emits or absorbs light only at specific wavelengths, the chemical composition of stars can be determined.

Why do scientists use the electromagnetic spectrum?

Astronomers use the entire electromagnetic spectrum to observe a variety of things. Radio waves and microwaves – the longest wavelengths and lowest energies of light – are used to peer inside dense interstellar clouds and track the motion of cold, dark gas.

What is the order of frequency?

The electromagnetic spectrum is a continuum of all electromagnetic waves arranged according to frequency and wavelength. As shown in the image the order of increasing frequency is : Radio waves, Visible light, X-rays and Gamma rays.

What is the order of increasing energy?

Orbitals in order of increasing energy: 1s, 2s, 2p, 3s, 3p, 3d, 4s, 4p, 4d, 4f, 5s, 5p, 5d, 5f, 6s, 6p, 6d, 6f, etc…

What is the relationship between energy and frequency?

Just as wavelength and frequency are related to light, they are also related to energy. The shorter the wavelengths and higher the frequency corresponds with greater energy. So the longer the wavelengths and lower the frequency results in lower energy.

What is directly proportional to frequency?

Frequency is defined as the number of oscillations of a wave per unit time being measured in hertz(Hz). The frequency is directly proportional to the pitch.

Does higher energy mean higher frequency?

The higher the frequency of light, the higher its energy. High frequency light has short wavelengths and high energy. X-rays or gamma-rays are examples of this. Radio waves are examples of light with a long wavelength, low frequency, and low energy

What happens to energy as frequency increases?

To summarise, waves carry energy. The amount of energy they carry is related to their frequency and their amplitude. The higher the frequency, the more energy, and the higher the amplitude, the more energy.

What color has the highest frequency?

Violet waves

What color has the shortest frequency?

Red

What are the colors that have higher frequency than red?

So red light vibrates at about 400 million million cycles per second. Fast! Higher frequency (with shorter wavelength) has more energy: Red light has lower frequency, longer wavelength and less energy….Visible Spectrum.

Color Wavelength Range (nm)
Red 620–750
Orange 590–620
Yellow 570–590
Green 495–570

Is red a higher frequency than blue?

Blue light has shorter waves, with wavelengths between about 450 and 495 nanometers. Red light has longer waves, with wavelengths around 620 to 750 nm. Blue light has a higher frequency and carries more energy than red light.

What is the frequency of the color red?

The visible spectrum

colour* wavelength (nm) frequency (1014 Hz)
red 650 4.62
orange 600 5.00
yellow 580 5.16
green 550 5.45

Does red light travel faster than blue?

Because the number of subquantum energy in a red photon is less than that of a blue photon, red photon interactions are less than the blue photon in the medium. So, the red light travels faster than the blue light.

What color light is fastest?

red light

Why does red light travel faster in glass?

The red light has the longest wavelengths so the crests or peaks encounter the glass last and are the last to be bent. All light travels at the same speed but it takes longer for the longer wavelengths like red to be bent by a prism

Why does blue light bend more than red?

The bending occurs because light travels more slowly in a denser medium. The amount of refraction increases as the wavelength of light decreases. Shorter wavelengths of light (violet and blue) are slowed more and consequently experience more bending than do the longer wavelengths (orange and red).

Which Colour is most dispersed?

Red has the highest wavelength and violet the lowest. Wavelength is inversely proportional to the deviation in the path of the light. Red light suffers the least amount of deviation and violet the most.

Why does red light bend the least?

Each beam of light has its own particular wavelength and is slowed differently by the glass. Violet light has a shorter wavelength; hence, it is slowed more than the longer wavelengths of red light. Consequently, violet light is bent the most while the red light is bent the least.

Which light will travel more faster red light or blue light in vacuum?

It’s an inversely proportional relationship. From the prism, we can conclude that the red light must be traveling through a greater speed compared to blue light as it is deflected the least.