With the help of ray diagrams, show the formation of image of an object by a concave mirror. When it is placed: (i) beyond the centre of curvature (ii) at the centre of curvature.

Figure below shows an object AB placed on the principal

axis of a convex lens placed in air. F₁ and F₂ are the two foci of the lens. Copy the diagram. (i) Draw a ray of light starting from B and passing through O. Show the same ray after refraction by the lens. (ii) Draw another ray from B which passes through F₂ after refraction by the lens. (iii) Locate the final image formed. (iv) Is the image real or inverted?

Find the position, nature and size of the image of an object 3 cm high place at a distance of 9 cm from a concave mirror of focal length 18 cm.

Multiple images are formed by a thick plane mirror. Which of the following is the brightest of all the images?

A plane mirror is placed vertically facing due north. An arrow pointing north-east is kept in front of the mirror. In which direction will the arrow point in this image?