F4 physic!(lens and force)

What is sharp image?

What is resultant force?

Explain them in Chinese or English.

Not Homework!

1 個解答

  • 天同
    Lv 7
    8 年前

    Q: What is sharp image?

    A: A sharp image (影像) is one that has distinct boundary.

    Q: What is resultant force?

    A: A resultant force is the vector sum of all involved forces when both force magnitudes and directions are taken into account in the summation.