Caption: Refraction of the image of a pencil in a glass of water. As water is poured into the glass, the image of the pencil is displaced from that suggested by the pencil's position. This is due to the refractive power of the water. Light travels at different velocities in different media, and as a light ray passes from one medium to another it appears to bend. As light travels more slowly in water than in air, the image of the pencil below the surface has been 'bent' away from its true position. To the right is a pencil in a glass without water, for comparison.

Release details: Model release not required. Property release not required.

Keywords: 10 seconds or greater, bend, bending, bent, classic, close up, close-up, closeup, comparison, concept, conceptual, control, demonstrating, demonstration, education, educational, experiment, glass, illusion, light, no one, no-one, nobody, optical, optics, pencil, physical, physics, principle, real time, real-time, realtime, red, refracting, refraction, refractive index, school, school science, science, science education, scientific, simple, speed of light, water, white background

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K004/9452 Rights Managed

Downloadable master

Duration: 00:00:12

Frame size: 1920x1080

Frame rate: 25

Audio: No

Format: QuickTime, Photo JPEG 100%, progressive scan, square pixels

File size: 214.5M


Capture format: Canon EOS 5D Mark II

Codec: H.264

Please contact Science Photo Library if you require the original, or other formats.


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