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Science Ch 3-4
Sound and Light - Electromagnetic Spectrum and Light
| Question | Answer |
|---|---|
| What happens when parallel rays of light hit a smooth surface? | regular reflection |
| Which electromagnetic waves have the longest wavelengths and lowest frequencies? | radio waves |
| How would a tomato look under blue light? | the tomato would appear black |
| Long, thin strands of glass or plastic that carry light for long distances without allowing the light to fade are called... | optical fibers |
| Which waves have some electrical properties and some magnetic properties? | electromagnetic waves |
| Visible light can be separated into various colors to form a... | spectrum. |
| What instrument is used in holography? | laser |
| FM signals travel as changes in... | the frequency of the wave |
| Which type of light bulb is commonly used in advertising signs and decoration? | neon |
| When a police officer uses radar for speed control, the officer is using what kind of electromagnetic waves? | radio waves |
| When the surface of a mirror curves inward, like the inside of a bowl (or a cave), it is called a... | concave mirror |
| A packet of light energy is called a... | photon |
| What do cell phones require to work? | a cellular system |
| Any two primary colors of light combined in equal amounts produce... | a secondary color. |
| An instrument used to view different colors of light produced by each type of light bulb is called a... | spectroscope. |
| What happens when light passes from air into water? | The light slows down |
| A laser beam can travel through a curled-up optical fiber because of... | total internal reflection. |
| The images made by an infrared camera are called... | thermograms. |
| The signals generated by the rods and cones are carried to your brain by the... | optic nerve |
| The colored ring of muscle that controls the size of the pupil is called the... | iris |
| What instruments use lenses or mirrors to collect and focus light from distant objects? | telescopes |
| Light that has passed through a polarizing filter is called... | polarized light. |
| Because the light rays never meet, a concave lens can produce... | only a virtual image |
| What type of image does a plane mirror produce? | virtual and upright |
| The primary colors of light are.. | red, green, and blue |
| The speed of an electromagnetic wave is equal to... | wavelength times frequency |
| What occurs when parallel rays of light hit a rough or bumpy surface? | diffuse reflection |
| Which of the following is true of ultraviolet rays - they are visible; the carry information to televisions and radios; they help your body produce vitamin D? | They help your body produce vitamin D. |
| If something vibrates one million times per second, it has frequency of... | 1 megahertz |
| For each cell, or geographical area, a cellular phone system requires... | a tower. |
| Which light bulbs are coated on the inside with a powder? | fluorescent |
| A person is nearsighted if he or she... | has eyeballs that are a little too long. |
| Which type of light bulb glows when a filament inside it gets hot? | incandescent |
| Global Positioning System signals can tell you... | your exact location on Earth. |
| Colored substances that are used to color other materials are called... | pigments |
| In a vacuum, all electromagnetic waves have the same... | speed. |
| The transparent front surface of the eye is called the... | cornea. |
| Cell phone signals are transmitted by... | radio waves. |
| About how much faster than sound are electromagnetic waves? | one million times faster |
| A flat sheet of glass with a silver-colored coating on one side is a... | plane mirror |
| Broadcasting stations can send their signals around the world using... | television satellites. |
| What kind of waves to cellular telephones use to transmit and receive signals? | microwaves |
| Which device uses lenses to focus light rays and record an image of an object on photographic film? | camera |
| The range of electromagnetic waves placed in a certain order is called the... | electromagnetic spectrum |
| The Global Positioning System (GPS) was originally designed for use by... | the military |
| A material that reflects or absorbs any light that strikes it is... | opaque |
| A laser produces light that... | is coherent |
| What is transferred by electromagnetic waves? | electromagnetic radiation |
| A curved piece of glass or other transparent material that is used to refract light is called a... | lens |
| On AM broadcasts, what remains constant? | the frequency |
| Why are lasers useful in surgery? | Laser incisions usually heal faster than scalpel cuts |
| The bending of light rays as they enter a new medium is called... | refraction |
| Rods and cones are the light-sensitive cells on the.. | retina |
| An image of a distant object caused by refraction of light is called a... | mirage |
| Frosted glass and wax paper are... | translucent |
| Electromagnetic waves can transfer energy without a | medium |
| Visible light has a higher frequency than... | infrared rays |
| Clear glass, water, and air are examples of what kind of material? | transparent |
| Farsightedness can usually be corrected using... | convex lenses |
| The electromagnetic waves with the highest frequencies are called... | gamma rays |
Created by:
8thgraders