1➤ What type of electromagnetic waves is used in radar?Infrared raysMicrowaves Radio wavesUltra-violet rays 2➤ Which electromagnetic wave carries more energy than the others?Microwaves Infrared UV radiationVisible light 3➤ A type of EM wave that is for medical use, to help doctors look inside the body to diagnose bone fractures and tumors.Gamma rays X-raysMicrowavesInfrared 4➤ This EM wave are very strong that can kill living cells, and are used to treat cancer through the process called radiotherapy.Gamma rays X-raysMicrowavesInfrared 5➤ What type of EM wave is used in remote control of TV, video, cassette recorders, and other electronic appliances?Microwaves Infrared UV radiationVisible light 6➤ Electromagnetic waves are produced by __________current voltage source any disturbancevibrating charge 7➤ Which of the following forms of electromagnetic waves is used mostly in communication?X-ray Infrared Radio waveGamma rays 8➤ In the electromagnetic wave, the direction of the propagation of the wave is __________.always to the right.cannot be determined.parallel to electric and magnetic field direction.perpendicular to the electric and magnetic field direction. 9➤ Which of the following forms of electromagnetic waves has the widest frequency range?x-ray microwave ultravioletradio waves 10➤ What happens to the frequency of the electromagnetic wave if its wavelength increases?decreasesincreases as wellremains the same cannot tell; frequency and wavelength are two different concepts 11➤ What EM wave makes cellular telephones transmit and receive signals?radio waves microwaves visible lightgamma rays 12➤ All of the following are uses of visible light. Which one is not? it enables us to see things gives light to the screen of our devices for thermal imagingused in optical fibers 13➤ Which kind of wave is used in night vision goggles?microwave infrared gamma rayvisible light 14➤ Which of the following EM wave makes use of artificial lighting?visible spectrum x-ray gamma raysinfrared 15➤ Which of the following is a use of ultraviolet radiation?diagnosing bone fractureidentifying original from fake banknotesnight vision goggleoptical fiber 16➤ Which type of X-ray can penetrate even through metals?regular X-ray long wavelength X-ray short wavelength X-ray dental X-ray 17➤ What imaging technique uses powerful magnets, a computer, and radio waves to make detailed pictures inside your body?thermal imaging infrared imaging Magnetic Resonance Imaging (MRI)X-ray image 18➤ In an infrared camera, what color indicates warmer temperature?blue green violetyellow 19➤ Which of the EM waves below are emitted by stars and some radioactive substances?gamma rays radio waves microwaveX-ray 20➤ Which kind of wave causes the fluorescent chemicals to glow in sunlight?microwave ultraviolet gamma rayvisible light 21➤ Convex mirrors produce _______________ images.only virtual imagesvirtual or real imagesonly real images inverted images 22➤ In ray diagramming, an incident ray that is parallel to the principal axis _____________.will reflect parallel to the principal axiswill reflect through the center of curvature will refract through the focal pointwill continue along the same path through the lens 23➤ If the angle of incidence is 10 degrees from the normal line, what is the angle of reflection and the total angle between the incident and reflected ray?Angle of reflection = 30 ;Total angle = 60Angle of reflection = 40 ;Total angle = 20 Angle of reflection = 10; Total angle = 20Angle of reflection = 20;Total angle = 10 24➤ A ray that shows the direction that light travels after it has crossed over the boundary.Refracted Ray Incident Ray angle rayNormal Ray 25➤ The bending of light as it passes from one transparent substance into anotherReflection Focal RefractionVertex, V 26➤ The geometric center of the lensFocus, F Focal length RayVertex, V 27➤ What happens to the light rays that pass through a convex lens?All the light rays divergeAll the light rays convergeAll the light rays are absorbed by the lensSome light rays diverge, and some light rays converge 28➤ Describe the image that is produced by a concave lens.It is upright and larger than the objectIt is upright and smaller than the object It is upside down and larger than the object It is upside down and smaller than the object 29➤ A concave lens reflects light raysTowards the normalAway from the normalAlong the normalNone of the above 30➤ A concave lens reflects light raysTowards the normal Away from the normal Along the normalNone of the above SubmitYour score is
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