Question

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Answer 1

Answer:

A laser is a device that emits light through a process of optical amplification based on the stimulated emission of electromagnetic radiation. The word "laser" is an acronym for "light amplification by stimulated emission of radiation".

Step-by-step explanation:

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Answer 2

Answer:

1) 0

2) -66

3) 4

4) 998

Step-by-step explanation:

1)

Let, a/b is an integer

And its additive inverse is -(a/b)

Sum of integer And its additive inverse

=a/b +[-(a/b)]

=a/b - a/b

= 0

2)

Sum of -22 And -44

=(-22)+(-44)

= -22-44

= -66

3)

Division of -36 And X.

=>(-36)÷X = (-9)

=> -36/X = -9

=> X = 36/9

=> X=4

4)

Absolute value of -998

= | -998 |

= 998