屈折角

• angle of refraction

• angle of incidence

• angle of reflection

• critical angle

方角、方向

• direction

• location

• angle

• position

光ファイバー

• optical fiber

• copper wire

• coaxial cable

• fiber optic cable

広がる

• spread out

• contract

• compress

• gather

像

• image

• picture

• reflection

• shadow

屈折

• reflection

• refraction

• diffraction

• absorption

反射角

• angle of incidence

• angle of reflection

• angle of refraction

• angle of dispersion

光

• light

• darkness

• shadow

• brightness

折る

• fold

• bend

• break

• tear

周辺

• circumference

• diameter

• radius

• area