While interviews can be daunting they are an inevitable part of going for a new job. If you turn up well presented and demonstrate your passion for physics, children and teaching you will be off to a good start.
Make sure you are fully prepared. Research the school by looking at their Ofsted reports, their school results, their CVA score, the school website and prospectus. Ask questions.
You need to be sure that the school is right for you in terms of how you will fit in, how well you will be supported and how well the school is going to help you to develop as a teacher.
Look around the department and find out about technician support and resources. There is plenty of interview advice available online so spend some time looking at potential interview questions and thinking about how you’d answer them.