Packets of light energy are called…………….. .

Plants prepare their own food by trapping solar energy and are called……. .

Fill in the blanks: The movement of a part of a plant in response to light is called …………..

The energy required to raise the elctron from its ground state to some higher energy level is called ionization energy. (True /false)

The device that converting energ into mechanical energy is called…. .

The materials through which light can easily pass are called-