To come into sight or to become visible

दिखाई देना

English Usage: The stars are appearing as the night gets darker.

Hindi Usage: जैसे-जैसे रात गहरी होती जाती है, तारे दिखाई देने लगते हैं।

The act of appearing or coming into sight

प्रकट होना

English Usage: The appearing of the comet was a rare event.

Hindi Usage: धूमकेतु का प्रकट होना एक दुर्लभ घटना थी।