
What is the minimum number of rays required for locating the image formed by a concave mirror for an object. Draw a ray diagram to show the formation of image by a concave mirror.

Important Questions on Light - Reflection and Refraction



Object is placed between the device and its focus, image formed is enlarged and behind it.

Identify the device used as a spherical mirror or lens in the following cases, when the image formed is virtual and erect in each case.
Object is placed between the focus and device, image formed is enlarged and on the same side as that of the object.

Identify the device used as a spherical mirror or lens in the following cases, when the image formed is virtual and erect in each case.
Object is placed between infinity and device, image formed is diminished and between focus and optical centre on the same side as the object.

Identify the device used as a spherical mirror or lens in the following cases, when the image formed is virtual and erect in each case.
Object is placed between infinity and device, image formed is diminished and between pole and focus, behind it.

