If a person is suffering from hypermetropia, which object he/she most likely to see blurred?
At what position of the object does a convex lens act as a magnifying glass?
A normal eye cannot clearly see objects closer than ___ cm.
How many dots does the Braille system use?
Which one of these controls the amount of light entering the eye?
When white light passes through a glass prism, it is
Myopia is corrected by using spectacles with
Because of which reflection do we see objects from every direction?
The second law of reflection states that
The number of images formed by mirror at angle θ to each other is given by
In which of these objects is plane mirror used?
The body which absorbs some light incident on it and reflects the remaining light is
A light year is the distance that light travels in one year and is equal to
Time taken for light to reach from the earth to the sun is
The brain of a human being interprets the image as