Demainbray's optical model

Made:
1752
Optical model of a spectrum with inverted colours Optical model of a spectrum with inverted colours Demainbray's optical model Optical model of a spectrum with inverted colours Optical model of a spectrum with inverted colours

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Creative Commons LicenseThis image is released under a CC BY-NC-SA 4.0 Licence

Buy this image as a print 

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License this image for commercial use at Science and Society Picture Library

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Creative Commons LicenseThis image is released under a CC BY-NC-SA 4.0 Licence

Buy this image as a print 

Buy

License this image for commercial use at Science and Society Picture Library

License

Creative Commons LicenseThis image is released under a CC BY-NC-SA 4.0 Licence

Buy this image as a print 

Buy

License this image for commercial use at Science and Society Picture Library

License

Creative Commons LicenseThis image is released under a CC BY-NC-SA 4.0 Licence

Buy this image as a print 

Buy

License this image for commercial use at Science and Society Picture Library

License

Optical model of a spectrum with inverted colours
Science Museum Group
© The Board of Trustees of the Science Museum, London

Optical model of a spectrum with inverted colours
Science Museum Group
© The Board of Trustees of the Science Museum, London

King's College, London| Enquiries to Science Museum, London
Science Museum Group Collection

Optical model of a spectrum with inverted colours
King's College, London| Enquiries to Science Museum, London
Science Museum Group Collection

Optical model of a spectrum with inverted colours
King's College, London| Enquiries to Science Museum, London
Science Museum Group Collection

Optical model of a spectrum with inverted colours, maker unknwon, 1752. Once belonged to Stephen Demainbray. A handwritten inscription on the base reads: 'Prism screen & convex lens/Colours inverted '4''.

This model is one of a series of optical models that were once owned by Stephen Demainbray and used by him in his lectures on natural philosophy. it is the most complex of the series and consists of a pinhole in wood with a prism, a convex lens, a second pinhole at the focus of the lens, and a screen. Originally silk cords would have been used to represent the rays of light. Demainbray worked as superintendent at the King's observatory at Kew from 1768 and his collection of instruments and apparatus was absorbed into the King's own collection.

Details

Category:
King George III
Object Number:
1927-1432
Materials:
fruitwood, ivory, mahogany, paper (fibre product) and incomplete
Measurements:
overall: 80 mm x 230 mm x 80 mm, 0.28 kg
type:
model - representation and optical demonstration equipment
credit:
King's College, London