Chapter 9 test questions
About this set
Created by:
soccerbff176 on February 23, 2012
Subjects:
Description:
Mrs. Bravo
Period 4
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40 terms
Terms | Definitions |
|---|---|
 Radio waves | examples: Radio broadcasting |
| Mircowaves | examples: radar |
| Infrared rays | examples: incubator |
| Visible Light | examples: Seeing |
| Ultraviolet Rays | examples: Getting rid of cancer |
| X-rays | examples: Check for broken bones inside the body |
| Gamma rays | Diagnose and treat cancer |
| Electromagnetic Waves | Consists of changing electric and magnetic fields |
| Wavelength | The distance between the crests of waves |
| Frequency | The number of waves that pass a particular piont in a certain amount of time |
| Electromagnetic Radiation | The energy transferred by electromagnetic waves |
| Comic waves/Gamma | Electromagnetic waves with the shortest wavelengths and highest frequencies are |
| Regular and Diffuse | Two kinds of reflection |
| Image | A copy of an object formed by reflected or refracted rays of light |
| Concave; convex, plane | A(n)________________ mirror can form real and virtual images. _________ and __________ mirrors form only virtual images. |
| Virtual and Real | Two types of images produced by mirrors |
| Diffuse | ___________ reflection occurs when light hits an irregular surface. |
| Regular | ____________ reflection occurs when light hits a smooth surface. |
| Real | A(n)___________ image is formed when light rays meet. |
| Optical Axis | The _______________ is an imaginary line that divides a mirror in half. |
| Focal Point | The________________ is the point at which light rays parallel to the optical axis meet. |
| Virtual | A(n) ________________ image is right-side up. |
| Plane | A(n) _________________ mirror is a flat glass with silver colored coating on one side. |
| Mirage | A(n) _________________ is an image of a distant object caused by light refraction through air of varying temperature. |
| Lens | A(n) _________________ is a curved piece of glass or other transparnet substance that is used to refract light. |
| Convex | A(n) _________________ lens is thicker in the center than at the edges. |
| Concave | A(n) _________________ lens is thinner in the center than at the edges. |
| Index | The __________________ of refraction is a measure of how much a ray of light bends when it passes from one medium into another. |
| Reflection | When waves bounce off a barrier |
| Transverse | Electromagnetic waves are ______________ waves. |
| Echo | Reflected sound |
| Amplitude | Height of a wave |
| Crest | Top of a wave |
| Trough | Bottom of a wave |
| Wavelength | Distance of one complete wave |
| Frequency | Number of wave cycles in a given unit of time |
| Refraction | Bending of light through a medium |
| Einstein | German-American physicist 1879- 1955 |
| Medium | Intervening substance that allows waves to pass |
| Elasticity | Density of a medium |
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