Enter an equation for the function. Give your answer in the form

a(b^n).

In the event that

a = 1,

give your answer in the form

bn.

A laser beam with an output of 6 milliwatts is directed into a series of mirrors. The laser beam loses 2% of its power every time it reflects off of a mirror. The power p(n) is a function of the number n of reflections.

KaylaDoodlez
Jan 30, 2018

#1**+2 **

One reflection mirror results in new beam of (1) (.98) (since .02 is lost)

next reflectoin of THIS beam (1)(.98) results in (1) (.98)(.98)

Next time it reflects (1) (.98)(.98)(.98)

etc

so b^n would be beam stength: (1) (.98)^n = (.98)^n Where n is the number of mirrors ....

ElectricPavlov
Jan 31, 2018

#3**+1 **

Agree with Cphil...missed the 6 mw part

p(n) = POWER = 6 (.98)^n milliwatts where n = number of reflections....

Sorry!

ElectricPavlov
Jan 31, 2018