A light ray suffers reflection and refraction at the boundary in passing from air to water. Draw a neat labelled ray diagram to show it.

Draw a neat and labelled diagram of a tooth.

Draw a neat and labelled diagram of a neuron.

In Figure, a ray of light A incident from air suffers partial reflection and refraction at the boundary of water. (a) Complete the diagram showing (i) the reflected ray B and (ii) the refracted ray C. (b) How are the angles of incidence i and refraction r related ?

Draw a neat and labelled diagram of the chloroplast.

A lens forms an erect, magnified and virtual image of an object. Draw a labelled ray diagram to show the image formation.

In figure, PQ and PR are the two light rays emerging from an object P. the ray PQ is refracted as QS. (a) state the special name given to the angle of incidence anglePQN for the ray PQ. (b) What is the angle of refraction for the refracted ray QS? (c) Name the phenomenono that occurs if the angle of incidence anglePQN is increased. (d) The ray PR suffers partial reflection and refraction on the water-air surface. give reason. (e) Draw in the diagram the refracted ray for the incident ray PR and hence show the position of the image of the object P by the letter P' when seen vertically from above.

Explain the following terms: reflected ray Draw diagram/diagrams to show them.

A ray of light, after refracting through a concave lens, emerges parallel to the principal axis. Draw a ray diagram to show the incident ray and its corresponding emergent ray.

A light ray is incident fromt a denser medium on the boundary separating it from a rarer medium at an angle of incidence equal to the critical angle. What is the angle of refraction for the ray ?

Draw a simplified labelled diagram of a hot cathode ray tube.