几何光学 jǐ hé guāng xué

DEFINITIONS

  1. geometric optics

CHARACTERS

几 jǐ
HSK 1
small table
何 hé
HSK 4
what, why, where, which, how
光 guāng
HSK 4
light, brilliant, shine; only
学 xué
HSK 1
learning, knowledge; school