Suppose that the lower half of a concave mirror's reflecting surface is covered with an opaque non-reflecting material. What effect will this have on the image of an object placed in front of the mirror ?
Text Solution
Verified by Experts
As laws of reflection are true for all points of the mirror, the image will be of the whole object (and not of object as expected erroneously). However, as area of the reflecting surface has been reduces, the intensity of the image will reduce.
Topper's Solved these Questions
OPTICS
PRADEEP|Exercise Very short answer question|5 Videos
OPTICS
PRADEEP|Exercise very short answer questions|1 Videos
If the lower half of a concave mirror's reflecting surface is made opaque, which of the following statements describe the image of an object placed in front of the mirror ? S1 : Intensity of the image will increase. S2 : The image will show only half of the object. S3 : No change in the image. S4 : Intensity if the image will be reduced to half.
A concave mirror produces three times magnified real image of an object placed at 10 cm in front of it. Where is the image located ?
After reflection, the light rays from a point object at the focus of a concave mirror,
Two plane mirrors are arranged such that their reflecting surfaces are perpendicular to each other. What is the number of images formed, when an object is placed between them?
(a) To construct a ray diagram, we use two rays which are so chosen that it is easy to know their directions after reflection from the mirror. List two such rays and state the path of these rays after reflection in case of concave mirrors. Use these two rays and draw ray diagram to locate the image of an object placed between pole and focus of a concave mirror. (b) A concave mirror produces three times magnified image on a screen. If the object is placed 20 cm in front of the mirror, how far is the screen from the object?
