Which of the following statements are correct regarding the image formed by a concave lens?
$\left(\mathrm{i}\right)$ The nature of image does not change much with the change in the object distance.
$\left(\mathrm{ii}\right)$ Always a virtual image is formed.
$\left(\mathrm{iii}\right)$ The image is larger in size.
$\left(\mathrm{iv}\right)$ Image is never formed between the optical center and the focus.

Which of the following ray diagrams shown below shows respectively the shortsightedness condition and its correctness by using a lens?

The diagram shows a ray of light reflected at a plane mirror. Which pair of the angle of incidence and angle of reflection is correct?

An optician holds a test card $50 \mathrm{cm}$ behind a patient. The patient then looks in the plane mirror which is $100 \mathrm{cm}$ away. How far away from the patient's eyes is the image of the test card?

The diagram shows a ray $\mathrm{P} \mathrm{Q} \mathrm{R}$ travelling through a glass slab. Which option in the table gives the correct name for all three rays?

A narrow beam of white light is passed through a glass prism as shown in the figure.

Which of the following is the correct order of colours emerging from the prism?