- #1
wil3
- 179
- 1
There are a lot of youtube videos and online forum speculations that suggest that tossing a disassembled spark plug at a car window will cause the window to spontaneously shatter. The supposed justification is that tempered glass can easily withstand from softer materials than it (such as the iron of a hammer), but even a light brush with a material of higher Mohs scale strength (such as the Aluminum Oxide within the spark plug) causes it to spontaneously shatter in a manner similar to Prince Rupert's drops.
Is this rumor true? If so, does someone have a more detailed explanation of the physics behind this effect. Sources would be excellent- google is not turning up any credible information.
Also, what specific properties of car door glass make it susceptible to this effect?
Thank you in advance.
Is this rumor true? If so, does someone have a more detailed explanation of the physics behind this effect. Sources would be excellent- google is not turning up any credible information.
Also, what specific properties of car door glass make it susceptible to this effect?
Thank you in advance.