Q.)  What is the time lag between emission of electrons and photon exposure to metallic surface? 

Deprecated: Function eregi_replace() is deprecated in /var/www/vhosts/extramarks.us/httpdocs/common/class/us_functions.php on line 232
Answer This   Report Abuse

Ans.1)  There is no time lag between emission of electrons and photon exposure to metallic surface in photoelectric effect.

With this, the particle nature of photon can be known.