Draw the energy level diagram showing the emission of `beta-particl es` followed by `gamma-rays` by a `"_27^60Co` nucleus?

Draw energy level diagram, showing the position of donor level and acceptor level inn-type and p-type semiconductor.

Draw and explain energy level diagram for hydrogen atom showing spectral series emitted by it.

Draw a labelled ray diagram showing the formation of a final image by a compound microscope at leat distance of distinct vision.

Draw a labelled diagram showing course of rays for a simple microscope or magnifying glass.

The energy level diagram of an element is given below. Identify by doing necessary calculations, which transitions corresponds to the emission of a spectral line of wavelength 102.7nm

By giving sign-conventions, derive the lens formula relating object distance, image distance and focal length for a thin convex lens. Draw a ray diagram to show the formation of image of an object placed between optical centre and focus of a convex lens.