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Heliograph vs Radioheliograph - What's the difference?

heliograph | radioheliograph |

As nouns the difference between heliograph and radioheliograph

is that heliograph is an apparatus for signalling by means of a moveable mirror which reflects flashes of sunlight while radioheliograph is (physics|astronomy) a heliograph that employs radio waves.

As a verb heliograph

is to send a message by heliograph.

heliograph

English

(wikipedia heliograph)

Noun

(en noun)
  • An apparatus for signalling by means of a moveable mirror which reflects flashes of sunlight.
  • *1979 , (Alasdair Gray), ‘Five Letters From an Eastern Empire’, Canongate 2012 (Every Short Story 1951-2012 ), p. 93:
  • *:when we stood up at nightfall we saw, in the sunset, the sparkle of the heliograph above cities, on the far side of the horizon.
  • A heliogram.
  • An instrument for measuring the intensity of sunlight.
  • A device for photographing the sun.
  • (obsolete) A photograph.

    • Verb

    (en verb)
  • To send a message by heliograph.
  • To send a heliograph.

    • Derived terms

    *heliographer *heliographic *heliography

    radioheliograph

    English

    Noun

    (en noun)
  • (physics, astronomy) A heliograph that employs radio waves