Examlex
A gamma-ray photon is back scattered at an angle of 180° after a collision with an electron.If the scattered photon has energy 150 keV,what was the energy of the initial photon?
Egocentric
A term referring to the inability or difficulty in understanding a perspective other than one's own.
Formal-Operations
A stage in Piaget's theory of cognitive development, typically beginning around age 12, where individuals start to use abstract and logical thinking.
Concrete-Operations
A stage in Piaget's theory of cognitive development where children gain the ability to think logically about concrete events.
Preoperational Child
Refers to the stage in Piaget’s theory of cognitive development (ages 2-7) where children begin to use language and think symbolically, but their thinking is still intuitive and egocentric.
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