These twin "Christmas Trees" were formed by an instrument which records the proton beam of Argonne's ZGS. Original public… https://www.rawpixel.com/image/3322282/free-photo-image-aec-beam-cc0Free Image from public domain licensePhiale (Shallow Bowl for Pouring Ritual Libations) by Ancient Greek https://www.rawpixel.com/image/8958222/phiale-shallow-bowl-for-pouring-ritual-libations-ancient-greekFree Image from public domain licenseSecond successful use of atomic energy in space is depicted in this drawing of the transit 4B and TRAAC satellite in orbit.… https://www.rawpixel.com/image/3322284/free-photo-image-black-and-white-astronomy-outer-spaceFree Image from public domain licenseThis is an artist's concept of the Navy's navigational satellite, the first to receive auxiliary power from atomic energy.… https://www.rawpixel.com/image/3322278/free-photo-image-station-public-domain-black-technologyFree Image from public domain licenseNMCP Anesthesiology Conducts Task Training220405-N-BB298-1002PORTSMOUTH, Va. (April 4, 2022) Naval Medical Center Portsmouth… https://www.rawpixel.com/image/9647490/photo-image-medicine-public-domain-hospitalFree Image from public domain licenseHands holding up colorful letters forming the abbreviation 4G https://www.rawpixel.com/image/452217/colorful-typographyView licenseHand Writing Working on Physics Assignment Study Education https://www.rawpixel.com/image/100145/premium-photo-image-math-mathematics-class-gravityView licenseCloseup of a plasma globe in the darkness https://www.rawpixel.com/image/413653/free-photo-image-electricity-energy-magicView licenseArtist's conception of the US Navy's Transit navigational satellite. Original public domain image from Flickr https://www.rawpixel.com/image/3322286/free-photo-image-technology-satellite-spacecraftFree Image from public domain licenseThe Los Alamos portable pulser produces a radio frequency (rf) signal that mimics what would come from a weapon. The signal… https://www.rawpixel.com/image/3322356/free-photo-image-radar-alamos-antennaFree Image from public domain licensePortrait of an African woman https://www.rawpixel.com/image/597895/beautiful-black-girlView licenseMicrogrid testing and analysis at Idaho National Laboratory. Original public domain image from Flickr https://www.rawpixel.com/image/3322373/free-photo-image-radar-antenna-broadcastFree Image from public domain licenseHeart defibrillator, healthcare photo. Free public domain CC0 image. https://www.rawpixel.com/image/6038732/photo-image-heart-public-domain-technologyFree Image from public domain licenseWoman listening to music with wireless headphones neon light https://www.rawpixel.com/image/2795958/premium-illustration-image-listening-music-neon-frequencyView licenseView of the solar concentrator/collectors - part of the solar total energy system. https://www.rawpixel.com/image/3322438/free-photo-image-antenna-broadcast-cc0Free Image from public domain licenseCloseup of a plasma globe in the darkness https://www.rawpixel.com/image/413740/free-photo-image-magic-energy-globe-handsView licenseHeart disease medicine cut out icon https://www.rawpixel.com/image/402389/free-photo-image-heart-beat-patient-care-healthy-lifeView licenseStudio People Shoot Portrait Isolated https://www.rawpixel.com/image/258277/premium-photo-image-antique-audio-backgroundView licenseStudio People Shoot Portrait Isolated https://www.rawpixel.com/image/254526/premium-photo-image-radio-waves-frequency-antiqueView licenseRadio Sound Audio Broadcast Frequency https://www.rawpixel.com/image/170591/premium-photo-image-radio-art-soundView licenseHand Writing Working on Physics Assignment Study Education https://www.rawpixel.com/image/100129/premium-photo-image-physics-torque-actionView licenseHeart beat frequency icon illustration https://www.rawpixel.com/image/475820/free-photo-image-donor-rate-line-medical-iconView licenseHeart disease medicine cut out icon https://www.rawpixel.com/image/402599/free-photo-image-cardiogram-heart-healthView licenseHeart disease medicine cut out icon https://www.rawpixel.com/image/402450/free-photo-image-beat-cardio-cardiogramView licenseStudio People Shoot Portrait Isolated https://www.rawpixel.com/image/258302/premium-photo-image-antique-audio-backgroundView licenseHand Writing Working on Physics Assignment Study Education https://www.rawpixel.com/image/100533/premium-photo-image-math-action-adultView licenseHand Writing Working on Physics Assignment Study Education https://www.rawpixel.com/image/100544/premium-photo-image-action-adult-calculateView licenseWoman holding a boombox https://www.rawpixel.com/image/185962/premium-photo-image-boombox-recording-studio-antennaView licenseContactless payment on a paper during coronavirus pandemic https://www.rawpixel.com/image/2325889/premium-photo-image-supermarket-cashier-contactless-paymentView licenseBlack portable music speaker on white background https://www.rawpixel.com/image/2437114/free-photo-image-amp-black-background-stereo-music-equalizerView licenseBlack portable music speaker on white background https://www.rawpixel.com/image/2437111/free-photo-image-speaker-music-advertisementView licenseStudio People Shoot Portrait Isolated https://www.rawpixel.com/image/226004/premium-photo-image-african-background-casualView licenseStudio People Shoot Portrait Isolated https://www.rawpixel.com/image/254550/premium-photo-image-antique-audio-backgroundView licenseStudio People Shoot Portrait Isolated https://www.rawpixel.com/image/226114/premium-photo-image-background-casual-caucasianView licenseStudio People Shoot Portrait Isolated https://www.rawpixel.com/image/254561/premium-photo-image-antique-audio-backgroundView licenseRadio transistor frequency broadcast audio https://www.rawpixel.com/image/105623/premium-photo-image-amplifier-audio-broadcastView licenseOld school vintage wooden radio https://www.rawpixel.com/image/534020/free-photo-image-radio-music-oldView licensees sitting on foot of the T&P (Texas and Pacific) railroad station, New Roads, Louisiana. Note frequency of train operations… https://www.rawpixel.com/image/12167789/image-person-art-vintageFree Image from public domain license[Untitled photo, possibly related to: es sitting on foot of the T&P (Texas and Pacific) railroad station, New Roads… https://www.rawpixel.com/image/12167797/image-face-hand-personFree Image from public domain licenseHand holding walkie-talkie isolated on background https://www.rawpixel.com/image/51620/premium-photo-image-walkie-talkie-antenna-communicateView licenseHeartbeat frequency vector illustration icon https://www.rawpixel.com/image/476176/free-photo-image-heartbeat-heart-rate-blood-pressureView licenseInterracial couple on a couch holding frequency icons https://www.rawpixel.com/image/482988/image-rawpixelcomView licenseColorful acrylic frequency textured background https://www.rawpixel.com/image/577814/colorful-abstract-backgroundView licenseBand of musicians holding a frequency icon https://www.rawpixel.com/image/482909/image-rawpixelcomView licenseStudio People Shoot Portrait Isolated https://www.rawpixel.com/image/258454/premium-photo-image-antique-audio-backgroundView licenseStudio People Shoot Portrait Isolated https://www.rawpixel.com/image/258406/premium-photo-image-antique-audio-backgroundView licenseStudio People Shoot Portrait Isolated https://www.rawpixel.com/image/258394/premium-photo-image-antique-audio-backgroundView licenseStudio People Shoot Portrait Isolated https://www.rawpixel.com/image/232449/premium-photo-image-african-background-casualView licenseStudio People Shoot Portrait Isolated https://www.rawpixel.com/image/258322/premium-photo-image-antique-audio-backgroundView licenseStudio People Shoot Portrait Isolated https://www.rawpixel.com/image/258318/premium-photo-image-antique-audio-backgroundView licenseStudio People Shoot Portrait Isolated https://www.rawpixel.com/image/258314/premium-photo-image-antique-audio-backgroundView licenseStudio People Shoot Portrait Isolated https://www.rawpixel.com/image/258310/premium-photo-image-antique-audio-backgroundView licenseStudio People Shoot Portrait Isolated https://www.rawpixel.com/image/258306/premium-photo-image-antique-audio-backgroundView licenseStudio People Shoot Portrait Isolated https://www.rawpixel.com/image/258298/premium-photo-image-antique-audio-backgroundView licenseStudio People Shoot Portrait Isolated https://www.rawpixel.com/image/258294/premium-photo-image-antique-audio-backgroundView licenseStudio People Shoot Portrait Isolated https://www.rawpixel.com/image/258286/premium-photo-image-antique-audio-backgroundView licenseStudio People Shoot Portrait Isolated https://www.rawpixel.com/image/258282/premium-photo-image-antique-audio-backgroundView licenseStudio People Shoot Portrait Isolated https://www.rawpixel.com/image/258278/premium-photo-image-antique-audio-backgroundView licenseInterracial couple on a couch holding frequency icons https://www.rawpixel.com/image/482960/image-rawpixelcomView licenseStudio People Shoot Portrait Isolated https://www.rawpixel.com/image/176146/premium-photo-image-audio-background-beigeView licenseStudio People Shoot Portrait Isolated https://www.rawpixel.com/image/176106/premium-photo-image-audio-background-beigeView licenseColorful acrylic frequency textured background https://www.rawpixel.com/image/577792/colorful-abstract-backgroundView licenseWoman holding a frequency icon in a studio https://www.rawpixel.com/image/483349/image-rawpixelcomView licenseRadio receiver broadcast channel vintage tuner https://www.rawpixel.com/image/51645/premium-photo-image-radio-vintage-am-fmView licenseStudio People Shoot Portrait Isolated https://www.rawpixel.com/image/175842/premium-photo-image-audio-background-broadcastView licenseStudio People Shoot Portrait Isolated https://www.rawpixel.com/image/175838/premium-photo-image-audio-background-beigeView licenseStudio People Shoot Portrait Isolated https://www.rawpixel.com/image/175782/premium-photo-image-audio-background-beigeView licenseHand holding walkie-talkie isolated on background https://www.rawpixel.com/image/51505/premium-photo-image-walkie-talkie-antenna-communicateView licenseWoman holding a frequency icon and a laptop https://www.rawpixel.com/image/482771/image-rawpixelcomView licenseStudio People Shoot Portrait Isolated https://www.rawpixel.com/image/175694/premium-photo-image-audio-background-beigeView licenseStudio People Shoot Portrait Isolated https://www.rawpixel.com/image/175586/premium-photo-image-audio-background-beigeView licenseStudio People Shoot Portrait Isolated https://www.rawpixel.com/image/232884/premium-photo-image-background-casual-caucasianView license