SOLUTION: Astronomers can use the brihtness of two light sources,such as stars, to compare the distances from the light sources.The intensity , or brightness, of light I is inversely proport
Algebra.Com
Question 461960: Astronomers can use the brihtness of two light sources,such as stars, to compare the distances from the light sources.The intensity , or brightness, of light I is inversely proportionnal to the square of the distance from the light source d.
a) rite an qution that represents this sititution.
b) if d is the independent variable and I is the dependent variable,graph the rqution from exercise a when k=16
c) if two people are viewing the same light source,and one person is three time the distance from the light source as the other person,compare the light intensities t
page 470#42
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Astronomers can use the brihtness of two light sources,such as stars, to compare the distances from the light sources.The intensity , or brightness, of light I is inversely proportionnal to the square of the distance from the light source d.
a) write an equation that represents this situation.
Ans: I = k/d^2
-----------------------
b) if d is the independent variable and I is the dependent variable,graph the equation from exercise a when k=16
I = 16/d^2
------------------
-----------------------------------------------
c) if two people are viewing the same light source,and one person is three times the distance from the light source as the other person,compare the light intensities t
--
intensity for person closer to sight source = k/d^2
intesity for person further away = k/(3d)^2
---
Compare the two by dividing: [k/d^2]/[k/(3d)^2] = (k/d^2) = 9
----
The intesity for the person closer to the light source
is 9 times as great as for the person further away from
the light source.
============
Cheers.
RELATED QUESTIONS
A piece of cardboard is placed midway between two sources of light of equal intensity... (answered by Alan3354)
The intensity of the light from an object varies inversely with the square of the... (answered by TimothyLamb)
Astronomers measure large distances in light-years. One light-year is the distance that... (answered by ewatrrr)
Astronomers measure large distances in light-years. One light-year is the distance that... (answered by ewatrrr)
A lighthouse has dual beams (two light sources opposite each other.) Ships at sea observe (answered by jim_thompson5910)
You are performing an expirement to determine how well plants grow under different light... (answered by stanbon)
1. One light-year is defined by astronomers tobe the distance that a beam of light will... (answered by josgarithmetic,ankor@dixie-net.com)
Speed of light is 3 x10^8 m/s. At this speed, how long a stars light will take if the... (answered by josgarithmetic,ikleyn,Alan3354)
how would you design a circuit for ahall light that has switches at both ends of hall... (answered by richwmiller,Theo)