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Light Microscopy Videos

Light Microscopy Videos

Light microscopy of Morpho aega butterfly scales demonstrating a metallic iridescent colour caused by interference of light rather than the presence of a blue pigment. The colour of the scales appears to change depending upon the angle at which they are viewed and of the light striking the scales.

Marine diatoms, mostly Gyrosigma sp.,

Marine diatoms, mostly Gyrosigma sp.,

Marine diatoms, mostly Gyrosigma sp.,

Isolated Potato starch grains demonstrating the chatacteristic blue-black reaction as dilute Iodine solution is introduced.

Potato starch grains in tuber cells demonstrating the chatacteristic blue-black reaction as dilute Iodine solution is introduced.

Potato starch grains in tuber cells demonstrating the chatacteristic blue-black reaction as dilute Iodine solution is introduced.

Isolated Potato starch grains viewed with polarised light clearly showing growth rings and the characteric ‘maltese cross’ with its origin at the grain’s hilum.

Isolated Potato starch grains viewed with polarised light and interference filter clearly showing growth rings and the characteric ‘maltese cross’ with its origin at the grain’s hilum. The grains are colourless under normal conditions and the colours are due to the way polarised light interacts with them.

Isolated Potato starch grains viewed with polarised light clearly showing growth rings and the characteric ‘maltese cross’ with its origin at the grain’s hilum. The start of the clip shows starch grains before a polarising filter was introduced into the light path and the end after the filter was removed. The starch grains themselves have no colour when view by ordinary light.

Isolated Potato starch grains viewed with polarised light clearly showing growth rings and the characteric ‘maltese cross’ with its origin at the grain’s hilum.

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