English中文EspañolFrançais
concave primary mirror /kɒŋkˈeɪv ˈpɹaɪməɹi ˈmɪɹə/ n

中文：凹面主镜

中文 · 凹面主镜Español · espejo cóncavo primarioFrançais · miroir primaire concave
Meaning：Mirror that collects light and whose shape makes it possible to direct it toward the secondary mirror.
▶ Start interactive picture-tap lesson

Found in these illustrated scenes（1）

Reflecting telescope cutaway

‹ Browse all scenes