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Description
Shadowgraph showing the bending of light due to heat of a small gas torch. Small light source from a flash using fibre optic tube focused though a pin hole then reflected off a mirror to create parallel light rays and imaged with out a camera system and with an 8x10 sheet of Tmax 400 placed in the path of the shadow.

Description
Shadowgraph showing the bending of light due to heat of a small gas torch. Small light source from a flash using fibre optic tube focused though a pin hole then reflected off a mirror to create parallel light rays and imaged with out a camera system and with an 8x10 sheet of Tmax 400 placed in the path of the shadow.