What impact did the us development of the atomic bomb have on world war ii?

After the US dropped atomic bombs on two major cities in Japan, Japan surrendered.

Explanation:

The use of the atomic bomb quickly ended the major conflict ongoing in the Pacific ocean.

The decision of the Japanese Empire was not to surrender, and in the late phase extreme measures were taken to deploy Kamikaze:

Pilots were willing to sacrifice themselves as a plane crashed on cruisers and fleets in the Pacific. The American side was combating to expel the Japanese occupations of many islands in Southern Asia, Oceania and scattered all over.

The decision to use the world war in Nagasaki and Hiroshima sent a clear message to the remaining forces in Japan and they consecutively abdicated.

A moral debate of the use of the recently developed nuclear bomb followed in the US and worldwide, still today the debate is sometimes revived.