The sun’s rays can be magnified by a lens or magnifying mirror, so it is dangerous to leave glass objects, like magnifying mirrors, too close to windows, as they can concentrate the suns ray, causing nearby objects to set fire (curtains / clothing / paper or furniture).
Safety advice
– Keep magnifying mirrors out of direct sunlight.
– Never put glass ornaments or paperweights on window sills.
– Never place glass ornaments or paperweights in direct sunlight.
– Make sure shaving or vanity mirrors are not left on window sills.
– Be aware of objects in your home such as shaving or vanity mirrors and glass ornaments or paperweights that may be exposed to direct sunlight.
Thanks to our Lincolnshire colleagues for this post