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Similar to 2017 4-1-光的反射與平面鏡
Similar to 2017 4-1-光的反射與平面鏡 (16)
More from 阿Samn的物理課本 (20)
2017 4-1-光的反射與平面鏡
- 15. 解
△ 𝐴𝐸𝐹 ∼△ 𝐴𝐷𝐺 ⇒
𝐸𝐹
ℎ
=
1
2
⇒ 𝐸𝐹 =
ℎ
2
△ 𝐺𝐹𝐻 ∼△ 𝐺𝐴𝐼 ⇒
𝐹𝐻
𝑏
=
1
2
⇒ 𝐹𝐻 =
𝑏
2
1)
2)
- 16. 解
△ 𝐷𝐶𝐸 ∼△ 𝐷𝐵𝐴 ⇒
𝐶𝐸
𝑎
=
1
2
⇒ 𝐶𝐸 =
1
2
𝑎
𝐸𝐻 = 𝑎 + 𝑏 −
1
2
𝑎
= 𝑏 +
𝑎
2
= ℎ −
𝑎
2
3)