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UVa and UVb are considered beneficial to the skin as they are responsible for the production of Vitamin D and certain anti-cancer processes. UVc is considered carcinogenic and therefore anything above that is as well.
Wiki User
∙ 12y ago
Wiki User
∙ 14y agoI think that the wave that the sun emmits is Ultra-violet.
Wiki User
∙ 9y agoYes it can. But it can protect up to a certain limit.
Wiki User
∙ 9y agoThis is usually caused by UVB or UVC radiation, the very short wavelength parts of the Ultraviolet just lower in energy than X-Ray radiation.
John Sinclair
UVC is perfectly safe as it is fully absorbed by dead skin cells. There is no record of cancer being induced by UVC on unbroken skin.
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What is the human skull used for in the human body?
Protecting your brain, which must be the size of a pea if you are asking this question!
Why is female reproductive system is more complex than female reproductive system?
She must produce the female gametes (ova) and her body must also nurture and protect the developing fetus during pregancy
Why must we prefer close toed shoes or leather shoes than canvas or open-toed shoes in doing experiments?
To protect your feet from spillage! Canvas will draw liquid to your feet, leather repels.
Relationship between structure and function of nucleus?
The relationship between the structure and function of the nucleus is that the nucleus is an enclosed organelle and is large enough to hold the DNA. This is important because the nucleus must hold and protect the cells DNA.
How can you make sound into energy?
Sound waves are energy waves. All you need to do is pass them along or through something that can collect or resonate them. A microphone is a good example of a device that collects sound waves. Any drum will resonate sympathetically with one specific sound frequency passed along it's surface.
What waves can transfer energy with out a medium?
electromagnetic radiation, for example light
Difference between electromagnetic and mechanical waves?
Mechanical waves must use matter as a medium, they displace the matter in space. Examples of mechanical waves are sound waves (must go through gas (air) which is matter), ocean waves (must go through liquid (water) which is matter, and earthquakes (must go through solid (earth) which is matter.Electromagnetic waves do not need matter as a medium and are made of electromagnetic radiation, they cause fluctuations in the magnetic and electric fields that permeate space-time. Examples of electromagnetic waves are radio waves, microwaves, x-rays, and gamma rays (all are part of the electromagnetic spectrum or EMS).
How are sound waves and electromagnetic waves alike?
Electromagnet radiation must be converted to mechanical movement within the range of audio (20-20khz) to be heard.
Is electromagnetic a sound wave?
Sound waves and electromagnetic waves are different.Sound waves are the oscillating compression of molecules in a solid, liquid or gas. Electromagnetic waves are oscillations in the electric and magnetic fields. Sound waves, being mechanical, must have a material substance to travel through, but electromagnetic waves can travel through a vacuum, where there is no matter as well as travel through material.Sound is, of course, the vibrations of air which we hear with our ears, but can be vibrations in solids like steel or liquids like water. Electromagnetic waves include radio waves, light from the sun, and even x-rays.
What electromagnetic wave has the longest wave length?
first we must ask our selves do these waves really exist?
Why can radio waves travel through space but sound waves can not?
Radio waves travel through empty space because they are electromagnetic waves, whereas sound is a wave that must travel through air.
What sunscreen protects you the most against UV rays?
The sunscreens can protect you against UV. These must contain UV-B protection.
Do electromagnetic waves need a medium to transfer energy?
NoAnother PerspectiveAll waves require a medium. The medium is what restricts the waves propagation speed. If there were no medium, there would be no limit to the speed with which a wave could travel. The medium of radio waves, or electromagnetic (EM) waves, is space. There have to be more properties of space than I can imagine, but in relation to EM waves, I can think of at least two; elasticity and density. The elasticity of space must be excessive in order to allow waves of extremely short length to propagate with equal fidelity as waves with extremely long lengths. The density of space must be excessive as well, in order for EM waves to be able to travel the distances they do with any representation of the original source.
Does anyone know about or recommend the book by Khaptad Baba titled Science of Thought?
It is a very scientific book . It deals with the thought waves and electromagnetic waves. It even mentions about einsteins theory . It is a must read book.
What is the basic radio principle?
The basic radio principle is: -- Electromagnetic waves at a desired wavelength can be generated and radiated, easily, cheaply, and continuously. -- Information can be added to the electromagnetic waves, easily and cheaply. -- The electromagnetic waves can be detected, reliably, easily, and cheaply, at a useful distance from the place where they were generated -- The waves can be easily and cheaply separated from all other electromagnetic waves that have different wavelengths. -- The information impressed on the waves can be reliably, easily, and cheaply recovered.
Compare mechanical waves and elctromagnetic waves?
Mechanical waves: -Must have a medium to propagate through -Can be transverse (water waves) or longitudinal (sound waves) -Can have any corresponding wavelength, period and wavelength (physical laws permitting) Electromagnetic waves: -Does not need a medium as the wave has wave/particle duality -Made up of photons (wave/particle duality again) -Always transverse -Always travels at the speed of light (therefore any wavelength will have a prescribd period)
What is the difference between an em wave and a sound wave?
Electromagnetic wave is transverse in nature whereas sound waves are longitudinal Electromagnetic waves are not mechanical waves. This means that it does not need any material medium to pass through. Even through free space ie vacuum em wave can traverse. But sound waves are mechanical and hence a material medium is a must. Electromagnetic waves has electrical and magnetic energy. Sound waves have mechanical energy. Human eyes see the visible part of electromagnetic waves. Human ears hear the audible part of sound waves. The speed of light in vacuum is 3 x 108 m/s which is incredible. According to theory of relativity, light speed is invariant with respect to the different frames of reference. But sound speed will be some 330 m/s ie very very low compared to that of light. Sound speed is relative one and it is not an invariant. It depends on the movement of the observer.
