Question

Why did Einstein write a letter to Franklin Roosevelt?​

Answer 1

Explanation:

The letter of Einstein warned that Germany might develop atomic bombs and suggested that the United States should start its own nuclear program. It prompted action by Roosevelt, which eventually resulted in the Manhattan Project developing the first atomic bombs.

Answer 2

Einstein feared that the German under the rule of the with nazis has developed the atomic bomb and could miss use it. He wrote to the president of USA to warm him of his development..