Why is it necessary that the solar concentrators used by solar power plants be able to move throughout the day? to avoid rain damage to track the sun as it moves across the sky to direct sunlight to different parts of the power plant to change the focus area of the incoming radiatio

To track the sun as it moves across the sky

Explanation:The reason being, in order to harness solar energy, the solar panels must be pointed towards the sun, in which the energy can be then harnessed and stored.

the blue glow lasts for about 30 seconds per application. detecting the glow requires a fairly dark room.