Presentation on theme: "A review for the quiz. Sound waves from a radio generally travel in which medium? a) air b) light c) earth d) water."— Presentation transcript:
A review for the quiz
Sound waves from a radio generally travel in which medium? a) air b) light c) earth d) water
Our eyes can detect light only within a range of _____ called visible light. a) frequencies b) mediums c) speeds d) periods
The speed of a sound wave a) depends on wavelength. b) depends on amplitude. c) depends on the medium. d) None of the above
Longitudinal waves travel quickly in a _____ because the molecules are closely packed and physically bonded together. a) liquid b) solid c) gas d) None of the above
The differences in color in visible light, such as those in a rainbow, are caused by differences in a) amplitude. b) medium. c) speed. d) frequency.
Light waves a) require a medium. b) cannot travel through liquids. c) cannot travel through solids. d) are electromagnetic waves.
Light waves are a) transverse waves. b) rotating waves. c) longitudinal waves. d) circular waves.
The color of light is determined by the _____ of the light waves. a) medium b) frequency c) speed d) amplitude
Which type of electromagnetic waves has the highest energy? a) gamma rays b) infrared c) ultraviolet light d) microwaves
Which type of electromagnetic radiation is used to kill cancer cells? a) microwaves b) ultraviolet rays c) gamma rays d) sunlight
Radar works by sending a signal out from an air-traffic control tower that is a) analyzed by a Doppler scanner on the ground. b) reflected off a plane back to the control tower. c) increased in intensity as it passes through the atmosphere. d) scanned and analyzed by a receiver on board an airplane.
The color that an object appears to be depends on the a) angle at which visible light is reflected off the object. b) use of additive rather than subtractive colors. c) wavelengths of visible light that reaches your eyes. d) speed with which visible light reaches it.
When light moves from a material in which its speed is higher to a material in which its speed is lower, it is a) bent toward the normal. b) reflected off the boundary. c) bent away from the normal. d) changed into a virtual image.
Light rays that pass through a lens change direction because a) of internal reflection. b) they are refracted. c) light is broken up into many different colors. d) virtual images always appear slightly larger than real images.
Light demonstrates wave characteristics when it is a) reflected. b) diffracted. c) refracted. d) All of the above
Light demonstrates particle characteristics when it a) knocks electrons off a metal surface. b) forms standing waves. c) passes through a narrow opening. d) All of the above
As the frequency of light waves increases, a) the energy increases. b) the energy stays the same. c) the energy decreases. d) the wavelength increases.
Light rays reflecting off a rough surface reflect a) diffusely. b) at all angles. c) at a single angle. d) None of the above
The law of reflection says the angle of incidence is _____ the angle of reflection. a) greater than b) equal to c) less than d) None of the above
When you look in a convex mirror, the image appears a) smaller than it really is. b) larger than it really is. c) lighter than it really is. d) darker than it really is.
Which statement about a diverging lens is correct? a) It bends light inward and can create either a virtual or a real image. b) It bends light inward and can only create a real image. c) It bends light outward and can create either a virtual or a real image. d) It bends light outward and can only create a virtual image.
Light is composed of waves and particles called: a) electrons b) photons c) quarks d) waves
The visible spectrum of light from the longest to shortest wavelength is: a) violet, indigo, blue, green, yellow, orange, red b) red, orange, yellow, green, blue, indigo, violet c) infrared, ultraviolet, gamma, x-rays, microwaves d) green, orange, red, violet
A magnifying glass is an example of a: a) convex lens b) prism c) concave lens d) convex mirror
Convex lenses converge light rays to a: a) real image b) focal point c) focus d) virtual image
An example of a diverging lens that spreads light rays is the: a) convex lens b) converging lens c) concave lens d) prism
A survivor from a shipwreck sees an image of a fish in the water. To catch it with her spear, she must a) aim above the image of the fish b) aim at the image of the fish c) aim below the image of the fish d) aim behind the fish
When the crests of one wave overlap the crests of another wave or wave, this occurs a) diffraction b) constructive interference c) destructive interference d) resonant frequencies
An echo is the result of a a) reflected sound wave b) refracted sound wave c) diffracted sound wave d) dispersed sound wave
What happens to a wave when it is refracted? a) It is bent b) It is reflected c) It is diffracted d) It is radiated
a) optics b) convex c) image d) convergent e) object f) divergent g) concave ____31.The study of how light behaves. ____32.A lens or mirror that is bigger in the middle. ____33.light rays that spread apart ____34.Where your eyes think something is. ____35.Light ray that come together. ____36.What you are actually looking at. ____37.A lens or mirror that is bigger at the ends.
a) Normal b) angle of reflection c) Mirror d) lens e) angle of incidence f) focus ____38.a line drawn perpendicular to the surface of a mirror or lens ____39.An optical device that works by refraction to bend light. ____40.from the normal to the incoming ray. ____41.from the normal to the outgoing ray ____42.Where all parallel rays come together ____43.an optical device that works by reflection
a) photon b) EM Spectrum c) prism d) energy level e) light ____44.An orbit of electrons. To move from low to high requires energy. ____45.all light: visible and invisible ____46.used to separate white light into its colors ____47.a single particle or packet of light ____48.a wave that can travel through a vacuum
Arrange the Electromagnetic Spectrum from low photon energy to high photon energy a) Gamma Rays b) X-rays c) Infrared d) Ultraviolet e) Microwaves f) Visible Light g) Radio Waves ____49.Lowest Photon Energy ____50.______ ____51.______ ____52.______ ____53.______ ____54.______ ____55.Highest Photon Energy
Convex and Concave Lens
Convex and Concave Mirrors
Primary Colors of Light
Total internal Refraction
Mirage- Optical Illusions two opposing parabolic mirrors