______ rays are absorbed by the ozone layer in the atmosphere.

_______ angle is the complementary angle of altitude angle.

Pyranometer measures _______ radiation while Pyrheliometer measures ___________ radiation.

Troughs of line focussing collectors are made up of ______.

Absorber of paraboloidal dish collectors are made up of

_______ water heater systems create considerable stress on the water channels in the collector.

_______ Gain method uses materials to hold, store and release heat energy during space heating.

________ Type green houses are constructed at the entrance of houses

______ systems are also known as power tower systems.

Distributed solar collectors are preferred for plants having a capacity of ______.

_______ tidal cycles occur in a lunar day.

______ tides occur when the sun and moon are in line with each other.

______ basin arrangement generates power only intermittently.

Dams are constructed in sites where tidal ranges are ______.

Sluice ways are used to ________________.

Beta alumina is used for making _______ in MHD generators.

Open cycle systems work at a temperature range of _______ degree celsius.

_______ is used as working fluid in closed cycle MHD systems.

_______ is the only source that can reach the full power level as soon as it is started.