半影
From Wikipedia, the free encyclopedia
From Wikipedia, the free encyclopedia
半影是發光體（弗是點光源）發出個光畀弗透明個物體遮脫過後，勒屏幕（或者別個物事）浪投射出來，本影邊浪比較暗個區域。該個場化發光體的光一部分畀遮脫。
月球一部分勒地球本影裏向，剩下來個勒地球半影裏向，出現個月食就是月偏食。
月球個半影投勒地球表面浪個區域，出現個日食是日偏食。
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