Karen Bugeja
Flashcards by , created about 4 years ago

Light flash cards form 2

Karen Bugeja
Created by Karen Bugeja about 4 years ago
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Question Answer
Luminous objects Give off light e.g. the sun
Non-luminous objects Do not give off light but reflect it from luminous objects 6f15dd78-e34a-4ce2-bcc4-a72aaba138a6.jpg (image/jpg)
- What is light? - Conservation of Energy Energy cannot be created or destroyed only converted. Light is a type of energy
How does light travel? Straight lines c610c3ae-36ae-4b70-a963-004ca63122c8.jpg (image/jpg)
How fast is light compared to sound? Examples: Light is much faster than sound e.g. thunderstorms and fireworks: the light is seen before it is heard.
Reflection 7a37c37a-799f-4954-8a4c-cb160e651727.jpg (image/jpg)
Shadows e274b8e7-26de-4759-ab77-7a2473bbcf7d.gif (image/gif)
Transparent When light encounters a transparent material almost all of the light rays pass through 1b003429-97a7-401d-8a06-9ef4b9764703.jpg (image/jpg)
Translucent When light encounters a translucent material some of the light rays pass through 1fb2dd8b-d673-408f-90a3-31e9809ead64.jpg (image/jpg)
Opaque When light encounters an opaque material no light passes through. A shadow forms 44e69f00-545f-43c9-8284-ffd1fa0f1e1a.gif (image/gif)
Refraction light does not have the same velocity in different mediums so the light rays become bent db59fba5-cee0-4bc3-916c-c3b46a8ac59a.jpg (image/jpg)
Total internal reflection 3bd73dcd-4409-4a20-986a-2124d46aa063.gif (image/gif)
The eye 29f4f4a5-7c76-405b-b4b4-aaf363aebee2.png (image/png)
Dispersion a24b5941-f1c9-4e79-a6fa-c303a206fff0.gif (image/gif)
Function of the cornea Refracts light as it enters the eye (by a fixed amount).
Function of Iris Controls how much light enters the pupil.
Function of Pupil Allows light to pass through as it enters the eye.
Function of lens Refracts light to focus it onto the retina.
Function of Retina Contains the light receptors, which trigger electrical impulses to be sent to the brain when light is detected.
Function of optic nerve Carries impulses from the retina to the brain