thunder is a sound wave, not an object. try wording your Вопросы better. and yes thunder would, because any surface will reflect sound waves. it would probably break the mirror though.
Actually, If Ты are asking if a soundwave LIKE thunder could hit a mirror, no it wouldn't reflect it. The mirror would shatter and just maybe a little sound would be produced but, not much. The shatter would be louder than the sound of the produced sound.
come on guys, couldn't Ты figure out he didn't mean the sound. Anyway. the way our eyes see mirrors is a reflection of light and lightening is much еще than light. Im not totally sure if glass is a conductor but if it was lightening wouldn't reflect off it. it would either pass down it или not pass through it at all. Lightening is electricity. Its just a lot of it.