Question

name practice ten ray reed date 12/11/25 all about em—notes outline the electromagnetic spectrum the em spectrum is the entire range of em waves in order of em frequency and decreasing wavelength. this means as you go from left to right on the chart, the wavelengths get smaller and the frequency gets higher. an inverse relationship exists between size of the wave and frequency. remember, all em waves travel at the same speed. the equation for speed is wavelength times the frequency. so, for the answer to always be 300,000km/s, as one number goes up, the other must go down. all em waves are transverse. the higher the frequency, the more energy in the wave. the spectrum of waves 1. radio waves have the lowest frequency, wavelength can go from 1000s of meters to.001 meters. (the shortest radio waves are the microwaves.) radio waves are used for: communication. 2. infrared waves(heat) have shorter wavelengths, from.001 m to 700 nm, and higher frequency. infrared is used for: heat, and night vision is what we can see in the em spectrum. wavelengths of visible light go from about 700 nm (red light) to 400 nm (violet light); the frequencies are higher than infrared. 4. ultraviolet wavelengths from about 400 nm to 10 nm, the frequency (and therefore the energy) is high enough with uv rays to damage living cells and cause mutations. too much uv can lead to sunburn and skin cancer. however, we need uv to produce vitamin d in our bodies. uv rays are mostly stopped. although humans cannot see uv light, butterflies, and bees can. 5. x - ray wavelengths are from 10 nm to.001 nm; they have enough energy to penetrate deep into tissues, but are blocked by dense materials. they are used for: medical imaging, security screening. 6. gamma rays have the shortest wavelengths (less than one trillionth of a meter), therefore the highest frequencies, therefore carry the most energy. these are the most damaging to tissues. they are hard to stop! you would need a 3 - 4 foot thick concrete wall to stop them. exploring the electromagnetic spectrum lesson—all about em - notes outline

Explanation:

To solve this fill - in - the - blank problem about the electromagnetic spectrum, we refer to the basic knowledge of the electromagnetic spectrum:

1. The EM Spectrum

• The EM spectrum is the entire range of EM waves in order of increasing frequency and decreasing wavelength. This means as you go from left to right on the chart, the wavelengths get smaller, and the frequency gets higher. An important relationship exists between the size of the wave and frequency. Remember, all EM waves travel at the same speed (the speed of light in a vacuum, which is \(c = 300,000\space km/s\)). The equation for speed is \(v=\lambda f\) (where \(v\) is speed, \(\lambda\) is wavelength, and \(f\) is frequency). So, as one number (wavelength or frequency) goes up, the other must go down. All EM waves are 300,000 km/s. The higher the frequency, the more energy in the wave.

2. The Spectrum of Waves

1. Radio waves have the longest wavelength and lowest frequency, wavelength can go from 1000s of meters to 001 meters. (The shortest radio waves are the microwaves.) Radio waves are used for communication (radio, TV, cell phones), radar, etc.
2. Infrared waves (heat) have shorter wavelengths, from 001 m to 700 nm, and higher frequency. Infrared is used for heating (remote controls, thermal imaging), and night - vision devices.
3. Visible is what we can see in the EM spectrum. Wavelengths of visible light go from about 700 nm (red light) to 400 nm (violet light); the frequencies are higher than infrared.
4. Ultraviolet wavelengths from about 400 nm to 10 nm, the frequency (and therefore the energy) is high enough with UV rays to damage living cells and cause mutations. Too much UV can lead to sunburn and skin cancer. However, we need UV to produce vitamin D in our bodies. UV rays are partially stopped. Although humans cannot see UV light, bees, butterflies, and some birds can.
5. X - ray wavelengths are from 10 nm to.001 nm; they have enough energy to penetrate soft tissues into tissues, but are blocked by dense (like bone) materials. They are used for medical imaging (X - rays of bones), security scanning.
6. Gamma rays have the shortest wavelengths (less than one trillionth of a meter), therefore the highest frequencies, therefore carry the most energy. These are the most dangerous to tissues. They are hard to stop! You would need a thick (several feet) thick concrete wall to stop them.

Answer:

s (filling in the blanks):

1. The EM spectrum is the \(\boldsymbol{\text{entire}}\) range of EM waves in order of \(\boldsymbol{\text{increasing}}\) frequency and \(\boldsymbol{\text{decreasing}}\) wavelength. This means as you go from left to right on the chart, the wavelengths get \(\boldsymbol{\text{smaller}}\), and the frequency gets \(\boldsymbol{\text{higher}}\). An important relationship exists between the size of the wave and frequency. Remember, all EM waves travel at the same \(\boldsymbol{\text{speed}}\) (the speed of light in a vacuum, which is \(c = 300,000\space km/s\)). The equation for speed is \(v=\lambda f\) (where \(v\) is speed, \(\lambda\) is wavelength, and \(f\) is frequency). So, as one number (wavelength or frequency) goes \(\boldsymbol{\text{up}}\), the other must go \(\boldsymbol{\text{down}}\). All EM waves are 300,000 km/s. The higher the \(\boldsymbol{\text{frequency}}\), the more \(\boldsymbol{\text{energy}}\) in the wave.
2. The Spectrum of Waves
3. \(\boldsymbol{\text{Radio}}\) waves have the \(\boldsymbol{\text{longest}}\) wavelength and \(\boldsymbol{\text{lowest}}\) frequency, wavelength can go from 1000s of meters to 001 meters. (The shortest radio waves are the \(\boldsymbol{\text{microwaves}}\).) Radio waves are used for \(\boldsymbol{\text{communication (radio, TV, cell phones)}}\) (or other valid uses like radar).
4. \(\boldsymbol{\text{Infrared}}\) waves (heat) have \(\boldsymbol{\text{shorter}}\) wavelengths, from 001 m to 700 nm, and \(\boldsymbol{\text{higher}}\) frequency. Infrared is used for \(\boldsymbol{\text{heating (or remote controls, thermal imaging)}}\) (and other valid uses), and \(\boldsymbol{\text{night - vision devices}}\) (or other valid uses).
5. \(\boldsymbol{\text{Visible}}\) is what we can \(\boldsymbol{\text{see}}\) in the EM spectrum. Wavelengths of visible light go from about 700 nm (\(\boldsymbol{\text{red}}\) light) to 400 nm (\(\boldsymbol{\text{violet}}\) light); the frequencies are \(\boldsymbol{\text{higher}}\) than infrared.
6. Ultraviolet wavelengths from about 400 nm to 10 nm, the \(\boldsymbol{\text{frequency}}\) (and therefore the \(\boldsymbol{\text{energy}}\)) is high enough with UV rays to \(\boldsymbol{\text{damage}}\) living \(\boldsymbol{\text{cells}}\) and cause \(\boldsymbol{\text{mutations}}\). Too much UV can lead to \(\boldsymbol{\text{sunburn}}\) and \(\boldsymbol{\text{skin cancer}}\). However, we \(\boldsymbol{\text{need}}\) UV to produce \(\boldsymbol{\text{vitamin D}}\) in our bodies. UV rays are \(\boldsymbol{\text{partially}}\) stopped. Although humans cannot see UV light, \(\boldsymbol{\text{bees}}\), butterflies, and \(\boldsymbol{\text{some birds}}\) can.
7. \(\boldsymbol{\text{X - ray}}\) wavelengths are from 10 nm to.001 nm; they have enough \(\boldsymbol{\text{energy}}\) to penetrate \(\boldsymbol{\text{soft tissues}}\) into tissues, but are \(\boldsymbol{\text{blocked}}\) by \(\boldsymbol{\text{dense (like bone)}}\) materials. They are used for \(\boldsymbol{\text{medical imaging (X - rays of bones)}}\) (or other valid uses), \(\boldsymbol{\text{security scanning}}\) (or other valid uses).
8. Gamma \(\boldsymbol{\text{rays}}\) have the \(\boldsymbol{\text{shortest}}\) wavelengths (less than one \(\boldsymbol{\text{trillionth}}\) of a meter), therefore the \(\boldsymbol{\text{highest}}\) frequencies, therefore carry the most \(\boldsymbol{\text{energy}}\). These are the most \(\boldsymbol{\text{dangerous}}\) to tissues. They are \(\boldsymbol{\text{hard}}\) to stop! You would need a \(\boldsymbol{\text{thick (several feet)}}\) thick concrete wall to stop them.