Question

Question 2
A. Define the following:
1) A ray of light
2) Class I lever
B. Give two differences between.
1) Umbra and penumbra
2) Class I and class II lever​

Answer 1

Answer:

ray of light

* a light travelling in anyone direction in a straight line is called ray of light. a group of light Ray's given out from a source is called beam of light.

class I lever

* a class one lever has the fulcrum placed between the effort and load. the movement of the load is the opposite direction of the movement of the effort. this is the most common lever configuration . class 1 lever . the effort in a class 1 lever is kne direction, and the load moves in the opposite direction.

give two differences between

1.) umbra and penumbura

* the umbra is the darkest part of the shadow while the penumbra is the lighter portion on the edges ...

2.) class 1 and class 11

* the differences is very simple - class 1 is licences allow you to drive a category c+ e vehicle , which is basically an articulated lorry ,or artic . A class 2 is licences allows u to drive a category c vehicle ,or what is frequently referred to as rigid