Modern discoveries have made easy the task of conveying Islam to people. For example, there were no loudspeakers in earlier times. As a result a speaker had to speak with a very raised volume to be able to be heard even to those present near him. Today loudspeakers make it easy to address large gatherings. Through radio and TV one can address people who are not even physically present with one. These are the conveniences provided by the modern age for conveying the message of Islam.