The passage asserts that Greek navies used a waepon named burning mirror to attack their enemies which it was made from a polished copper surface to focus sun's rays abd set enemies' ships on fire and provides three reasons of support. The lecture, on the contrary, debunks this passage' claim and says that the mentioned reasons provided by the passage is unconvincing.
First, the article claims that Greeks were not able to create an advanced mirror, since it needs a mirror with high power to intensify sunlight and it should be a parabolic shape. The professor casts doubt on this view by saying that people of ancient Greek need to use small pieces of copper to concentrate sunlight. They nevr use a single parabolic shape piece.
Second, the ships were made from wood and burning wood with a burning mirror needs about ten minute and ships are moving, since a burning mirror no longer is able to burn ships, according to the reading. The lecture repudiates this point by explaining that ancinet Greek people used some material to make ships water proof named pitch, so ships just need a few secons to burn and the burning mirror set ships on fire quickly.
Third, the author of the passage imparts that there was no need to create a mirror in ancient time, since Greeks had flaming arrows which were affective to set ships on fire. The professor disavows this idea by reasoning that flaming arrow was easy to observe, since they needed a device to focus sun's rays no linger be seen by enemy, as a result a burning mirror is magical and effective than flaming arrows. 
The passage asserts that  
Greek
 navies  
used
 a  
waepon
 named  
burning
 mirror to attack their enemies which it  
was made
 from a polished copper surface to focus sun's rays  
abd
 set enemies'  
ships
 on fire and provides three reasons of support. The lecture,  
on the contrary
, debunks this passage' claim and says that the mentioned reasons provided by the passage is unconvincing. 
First
, the article claims that Greeks were not able to create an advanced mirror, since it  
needs
 a mirror with high power to intensify sunlight and it should be a parabolic shape. The professor casts doubt on this view by saying that  
people
 of ancient  
Greek
  need
 to  
use
  small
 pieces of copper to concentrate sunlight. They  
nevr
  use
 a single parabolic shape piece.
Second, the  
ships
  were made
 from wood and  
burning
 wood with a  
burning
 mirror  
needs
 about ten minute and  
ships
 are moving, since a  
burning
 mirror no longer is able to burn  
ships
, according to the reading. The lecture repudiates this point by explaining that  
ancinet
  Greek
  people
  used
  some
 material to  
make
  ships
  water proof
 named pitch,  
so
  ships
  just
  need
 a few  
secons
 to burn and the  
burning
 mirror set  
ships
 on fire  
quickly
.
Third, the author of the passage imparts that there was no  
need
 to create a mirror in ancient time, since Greeks had flaming arrows which were affective to set  
ships
 on fire. The professor disavows this  
idea
 by reasoning that flaming arrow was easy to observe, since they needed a device to focus sun's rays no linger be  
seen
 by enemy,  
as a result
 a  
burning
 mirror is magical and  
effective
 than flaming arrows.