Question

define
Ray of light. c) Efficiency of a machine.
b) Energy. d) Luminous body. e) Inclined plane.

Answer 1

Answer:

1. 1 The light traveling in any one direction in a straight line is called a ray of light. A group of light rays given out from a source is called a beam of light.
2. Energy, in physics, the capacity for doing work
3. is the percent of work put into a machine by the user (input work) that becomes work done by the machine (output work)
4. a luminous body is one that emits its own light example- sun. Non luminous bodies are objects that reflect light from luminous bodies
5. An inclined plane, also known as a ramp, is a flat supporting surface tilted at an angle

Answer 2

Explanation:

Ray of light= ray is a line ( straight or curved) that is perpendicular

to the lights wave fronts

Efficiency of a machine.= Efficiency is the percent of work put into a machine by the user (input work) that becomes work done by the machine (output work).

Energy = Ability to do work .

Luminous body = Luminous body is a object that shines by it own light .

Inclined plane = An inclined plane is a slope which make work easier

Hope it helps you

This answer is in my own words