Presentation on theme: "By. Rohan Achar, Alye Miller, and Thomas Yi This shows electric and magnetic fields of radio waves."— Presentation transcript:
By. Rohan Achar, Alye Miller, and Thomas Yi This shows electric and magnetic fields of radio waves.
Radio Waves Radio waves are waves with wavelengths longer than microwaves They are used in T.V signals, and AM and FM radio They are also used by air traffic control with radar. Radio Waves with different frequencies are used for different reasons Their wavelengths range from a few millimeters to tens of kilometers They are used t o measure frequencies which is made possible by the Doppler Effect
These are radio waves with various frequencies and amplitudes.
Home microwave ovens operate at 2,450 megahertz. Overexposure can raise the body temperature and thus can could lead to burns or adverse effects on reproduction.
Microwaves -are electromagnetic waves with a frequency of 2,450 MH z. -The wavelengths are longer than infrared waves and shorter than radio waves. -They carry telecommunication systems (cell phones). -They are reflected by metals, and are transmitted through matter. -Water, fat and sugar absorb microwaves. -Overexposure can raise the body temperature and thus can could lead to burns or adverse effects on reproduction.
Microwave ovens use microwaves to heat up food. The food absorbs the waves. The waves vibrate molecules in the food which causes heat.
Infrared Waves Infrared waves are a type of electromagnetic (EM) wave that has a lower frequency than visible light. Therefore, we can’t see it. Infrared waves can heat things. An infrared sensor can detect and measure temperature of various objects.
Flatulence caught on Infrared Camera!!!
Ultraviolet Radiation By: Ronnie Parker Jessica Port Raghav Sharma Richard Dawkins (Aditya Nair)
Ultraviolet Radiation UV light lies just further than visible light on the EM spectrum (more energy, higher freq.) Invisible Energy higher, Frequency higher, Wavelength lower. Produces Vitamin D. Can be used in sterilization He needs to wear more sunblock- which blocks UV light which is high in energy which can harm your skin which can give you a sunburn which hurts and can lead to skin cancer which can kill you which can lead your loved ones to suicide, and eventually the entire world will be dead so wear sunblock.
UV light lies just beyond visible light, as you can see. It is higher in frequency and energy, and lower in wavelength than other forms of light.
X-rays Kory Sherman Victoria Ma 5°
What is an X-ray? Higher energy, shorter wavelengths than ultraviolet rays Wavelengths less than m can be dangerous –Can kill living cells or turn them into cancer cells Easily passes through soft tissue Hard substances, like bone and metal, stop x-rays
Doctors use x-rays to detect fractures and bone abnormalities X-rays can also detect bullets and metal objects in the human body Used in airports for security reasons –To detect dangerous metal objects like knives and ninja stars Uses for X-rays
X-rays can help people detect fractures in bones. Here, x-rays of artificial joints are shown.
Gamma Rays Melody Goodin, Sivan Mills
Info. on Gamma Rays! Very high energy High frequency – highest of spectrum Very small wavelength – smallest of spectrum Are not bent by magnetic field Great penetrating power Produced as a result of nuclear decay, most likely due to a change in energy level within the nucleus. Also known as Y-rays
Uses of Gamma Rays Used in medicine. Can be used to treat cancer – kill diseased cells in the body. Used as tracers in scientific and medical research.
Gamma Ray Pictures In this artist's impression of the central engine of a gamma-ray burst, a powerful jet of radiation and fast-moving particles blasts its way out of the central region of a dying star. (Image courtesy of NASA / SkyWorks Digital.)