thunder is a sound wave, not an object. try wording your vragen better. and yes thunder would, because any surface will reflect sound waves. it would probably break the mirror though.
Actually, If u 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 u figure out he didn't mean the sound. Anyway. the way our eyes see mirrors is a reflection of light and lightening is much meer 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 of not pass through it at all. Lightening is electricity. Its just a lot of it.