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Description
Flashcards by Inioluwa Ogun, updated more than 1 year ago
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Created by Inioluwa Ogun
over 3 years ago
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| Question | Answer |
| Optical Device | Any technology that uses light |
| Microscope | An optical device that allows you to see specimens in great detail. |
| Telescope | An optical device that allows |
| Refracting Telescope | Has two lenses, one on each end of a long tube. The larger lens is the objective lens that gathers light and focusses the rays toward the eyepiece, which in turn allows you to see the object larger than it appears with the unaided eye. |
| Reflecting Telescope | Uses a large circular mirror that curves inward. This curved surface gathers light extremely well. Another mirror inside the telescope directs light to the eyepiece, which leads to your eye. |
| Binoculars | Practically 2 short refracting telescopes fixed together. |
| Ray Diagrams | Shows how light travels. |
| Transparent | Objects that allow light to travel straight through them. Ex. glass, clear plastic |
| Translucent | Objects that allow only some light to pass through. Ex. frosted window pane |
| Opaque | Objects that do not allow any light to pass through it. They absorb or reflect the light that hits them. Since light cannot pass through them, a shadow is created behind it. Ex. wood, metal, humans (like me), bricks |
| Non-luminous | Objects that don't produce light. Ex. opaque objects, pencil |
| Luminous | Something that is a light source. Ex. the sun, a lamp |
| Regular Reflection | Occurs when light rays hit a smooth surface. The rays reflect at equal angles and they travel parallel to each other. |
| Diffuse Reflection | When light rays hit a rough or uneven surface. The rays reflect, but at different angles, because the surface is rough. |
| Incident Rays | Incoming rays. |
| Plane Mirrors | Flat mirrors and provide the clearest reflections. |
| Normal | A perpendicular line to a mirror at the point of reflection. (Look at textbook, pg. 196). |
| Angle of Incidence | The angle between the incident ray and the normal. |
| Angle of Reflection | The angle between the reflected ray and the normal. |
| Law of Reflection | A diagram that shows the law of reflection. (Look at textbook). |
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