Light is the only electromagnetic radiation that is visible to the human eye. It is made of little packets of energy known as photons. When a light wave is an incident on an object, a number of things can happen. It is either absorbed, transmitted or reflected. The manner in which visible light interacts with an object depends on the frequency of light and the nature of the atoms of the object. In this article, we will discuss how and why the light of certain frequencies are selectively absorbed, reflected and transmitted.

Symptoms of the flu such as a sore throat and a runny or stuffy nose are common. You may also get these symptoms with other illness such as a cold. But colds tend to start slowly, and the flu tends to come on quickly, within two or three days after you come in contact with the virus. And while a cold can be miserable, you usually feel much worse with the flu.

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The influenza vaccine isn't 100% effective. So it's important to take steps to lower the spread of infection, including:

Absorption of lightin photosynthesis

If you're young and healthy, the flu usually isn't serious. Although you may feel awful while you have it, the flu usually goes away in a week or two with no lasting effects.

Getting another infection can be a complication of getting the flu. That includes illnesses such as croup and sinus or ear infections. Lung infections are another complication. Infection of the heart muscle or heart lining may happen after getting the flu. And in some cases, people may have infection of the central nervous system.

If you have flu symptoms and are at risk of complications, see your healthcare professional right away. Starting antiviral medicine within two days after your symptoms show up may shorten the length of your illness and help prevent more-serious problems.

At specific frequencies, the electrons of the atom tend to vibrate. When a light wave of the same natural frequency is incident on the atom, the electrons of that atom will be set into vibrational motion. During vibration, electrons interact with neighbouring atoms in such a manner it converts the vibrational energy into thermal energy. Hence, we can conclude that the selective absorption of light occurs when the frequency of the light matches the frequency at which the electrons in the atoms vibrate. Different atoms and molecules possess different natural frequencies of vibration, hence they will selectively absorb different frequencies of visible light.

Aside from the vaccine, you can take other steps to help prevent infection with the flu. You can clean and disinfect surfaces, wash hands, and keep the air around you moving.

Absorption of lightExamples

In the United States, people who are Native American or Alaska Native, Black, or Latino may have a higher risk of needing care in the hospital for influenza.

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The viruses that cause flu spread at high levels during certain times of the year in the Northern and Southern hemispheres. These are called flu seasons. In North America, flu season usually runs between October and May.

If you're sick, stay home until you feel better and have had no fever for a full 24 hours, and you haven't taken medicine for fever during that time. If your fever returns or you start to feel worse, stay apart from others until your symptoms improve and you are fever-free without medicine for 24 hours. Doing so will lower your chance of infecting others.

Absorption of lightequation

The colour of the objects that we see is largely due to the interaction of the object with the incident light. The colour of the object is not within the object itself. Rather, it is in the light that shines upon it. When the light of a certain frequency falls on the object, the light frequencies that are absorbed never make it to our eyes. Only the frequencies of incident light that are reflected or transmitted contributes to the colour of the object. So if an object absorbs all the frequencies of the light wave except the frequency associated with green, then the object appears green.

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There are a range of factors that may raise your risk of catching a flu virus or having complications from a flu infection.

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Chronic conditions may increase the risk of influenza complications. Examples include asthma and other lung diseases, diabetes, heart disease, nervous system diseases, previous history of stroke, metabolic disorders, problems with the airway, and kidney, liver or blood disease.

2019820 — If you're asking why materials absorb light completely that's because the energy is converted to vibrational energy ie heat.

The first time children between 6 months and 8 years get a flu vaccine, they may need two doses given at least four weeks apart. After that, they can receive single annual doses of the flu vaccine. Check with your child's healthcare professional.

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Absorption of lightin physics

Contrary to the absorption of light, transmission and reflection of light occur when the natural frequency of the vibration of electrons do not match the frequencies of the incident light. In such cases, when the light wave strikes the objects, the electrons of the object begin to vibrate. The electrons vibrate for a brief period of time with small amplitude after which the energy is re-emitted as a light wave. If the object under consideration is transparent, the vibrations of the electrons are passed on to the neighbouring atoms and are re-emitted from the opposite side of the object. In such cases, the light is said to be transmitted. If the object is opaque, the vibrations of the electrons are not passed in bulk, rather the electrons of the atoms vibrate for a short period of time and are re-emitted as a reflected light wave from the surface of the object.

It's possible to spread the virus to others from about a day before symptoms appear until about 5 to 7 days after they start. This is called being contagious. Children and people with weakened immune systems may be contagious for a slightly longer time.

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Absorption of lightin wavelength

When the room lights are turned off, any object present in the room appears black. The colour of the object depends on the frequency of the light that is reflected in the observer’s eye. Without light, there is no reflected light as a result of which the green shirt appears black.

The U.S. Centers for Disease Control and Prevention (CDC) recommends annual flu vaccination for people age 6 months and older who do not have a medical reason to avoid the vaccine.

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The 2024-2025 seasonal flu vaccines each provide protection against three influenza viruses that researchers expect to be the most common this flu season.

There also are vaccines offered called high-dose or adjuvanted flu vaccines. These vaccines may help some people avoid the need for care in the hospital due to influenza. People over age 65 can get these vaccines. These vaccines also are recommended for people age 18 and older who have a solid organ transplant and take medicine to weaken their immune response.

2. One common historical belief was that coloured objects in nature produce small particles (perhaps light particles) that subsequently reach our eyes. Different objects produce different coloured particles, thus contributing to their different appearance. Is this belief accurate or not? Justify your answer.

Transmissionof light

Also, check with your healthcare team before receiving a flu vaccine if you had a serious reaction to a previous flu vaccine. People who have had Guillain-Barre syndrome also should check with a healthcare professional before getting the flu vaccine. And if you feel sick when you go to get the shot, check with your healthcare team to see if you should delay getting the vaccine.

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Absorption of lightby molecules

Flu, also called influenza, is an infection of the nose, throat and lungs, which are part of the respiratory system. The flu is caused by a virus. Influenza viruses are different from the "stomach flu" viruses that cause diarrhea and vomiting.

This view presumes that the appearance of an object is independent of the colours of light which illuminate the object. It must be noted that the same objects appear to be of different colour under a different light. Hence, the colour of an object is strictly not due to the object’s ability to produce a colour. The only role the object plays in determining its appearance is by absorbing certain wavelengths of the incident light.

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If you are an adult under the age of 65, you can choose to get your vaccine with a jet injector. Instead of a needle, this device uses a high-pressure, narrow stream of fluid to go through the skin.

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A person's first flu infection gives some long-term protection against similar strains of flu. But the vaccines offered each year are made to match the flu virus strains that are most likely to spread that season. The protection these vaccines offer lasts for months in most people.

Young people on long-term aspirin therapy are at risk of developing Reye's syndrome if infected with the influenza virus.

For older children and adults, the flu shot is usually given in a muscle in the arm. Younger children may get the flu shot in a thigh muscle.

In children, these symptoms may show up more generally as being fussy or irritable. Children also are more likely than adults to have ear pain, feel sick to the stomach, vomit or have diarrhea with the flu.

Seasonal influenza tends to have worse outcomes in young children, especially those age 2 years and younger. Adults older than age 65 also tend to have worse outcomes.

Most people with the flu get better on their own. But sometimes, influenza and its complications can be deadly. To help protect against seasonal flu, you can get an annual flu shot. Although the vaccine isn't 100% effective, it lowers the chances of having severe complications from the flu. This is especially true for people who are at high risk of flu complications.

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Influenza is caused by viruses. These viruses travel through the air in droplets when someone with the infection coughs, sneezes or talks. You can inhale the droplets directly. Or you can pick up the virus from touching an object, such as a computer keyboard, and then touching your eyes, nose or mouth.

An immune system that doesn't quickly clear out flu virus may raise the risk of getting the flu or getting flu complications. People may have a weakened immune system response from birth, due to illness, or due to disease treatment or medicine.