7 a) What is a spectrum?
b) Write a short note on photoreceptors of Retina.
8. a) Define Lateral inversion.
b) Draw a neat labelled diagram of Diverging lens.
C) Mention any two uses of it.
9. a) Differentiate Between Real and virtual image.
b) Explain about the type of image formed by concavemirror.
note:if u answer correctly I will mark as brilliant.
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Answer: 7 a)A spectrum is a condition that is not limited to a specific set of values but can vary, without steps, across a continuum. The word was first used scientifically in optics to describe the rainbow of colors in visible light after passing through a prism