Answer:
the formula of mechanical advantage is
MA = load / effort
VR = effort distance / load distance
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Answer:
An opaque object is an object through which the light rays can not be passed and we can not see from that object while transparent object allows the passage of light. Hence red apple is unable to pass light, so it is a opaque object. Hence red apple looks red because it absorbs all color except red.
Answer:
It is easy to imagine representing a narrow beam of light by a collection of parallel arrows—a bundle of rays. As the beam of light moves from one medium to another, reflects off surfaces, disperses, or comes to a focus, the bundle of rays traces the beam's progress in a simple geometrical manner.
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