| 1. | In 1780 Silberschlag observed and described the Brocken bow ( also called Brocken spectre ).
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| 2. | An optical illusion known as the Brocken spectre is a plausible explanation for the legend.
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| 3. | Sometimes a circular rainbow ( the Brocken spectre phenomenon ) can be seen from this point.
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| 4. | British mountaineer Frank Smythe stated he had observed his shadow cast as a Brocken Spectre across the mist on Ben Macdhui.
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| 5. | An optical illusion known as the Brocken spectre is a plausible explanation for some visual elements of the Big Grey Man legend.
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| 6. | A Brocken spectre, " mountain spectre " can occur in certain atmospheric conditions when the sun is at a particular angle.
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| 7. | It is noted for the phenomenon of the Brocken spectre and for witches'revels which reputedly took place there on Walpurgis night.
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| 8. | The Brocken spectre was observed and described by Johann Silberschlag in 1780, and has since been recorded often in literature about the region.
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| 9. | During this period, he witnessed a Brocken spectre and glory, caused by the sun casting a shadow on a cloud below the observer.
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| 10. | The Brocken spectre is a common phenomenon on this misty mountain, where a climber's shadow cast upon fog creates eerie optical effects.
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