\(power \ of \ a \ lens \ (D) = \frac{1}{focal \ length \ (m)}\) A lens has a power of -3.33 dioptres. Calculate the focal length and state what type of lens it is.

GCSE exams could be cut in order to reduce pupil’s stress, Labour’s curriculum review is expected to recommend. In an interim report published yesterday, concerns were raised by ministers that too ...

Because our interest lies in the development of plant viruses as immunotherapies targeting human health as well as gene delivery vectors for agriculture applications, we turned toward tobacco mosaic ...