Question

Concave lens of short focal length bends the light rays through _______ and causes higher ________.

Answer 1

Concave lens of small focal length bend the light through the focus and causes higher deviation

Explanation:

• The focal length is inversely proportional to the deviation of the path of the light which is incident on the concave lens. As a result of this if there is less focal length then there is more amount of deviation of light and as a result of this the overall deviation angle is more.
• This occurs because  the focal length when it is incident parallel to the principal axis

To know more,

what is the nature of the focus of concave lens - Brainly.in

https://brainly.in/question/8106675

Answer 2

With the increase in the distance there is decrease in the luminous intensity of the light

Explanation:

• The luminous intensity is directly proportional to the square of the distance between the source of production of light and the place where the luminous intensity is measured.

• As a result of this with increase in distance the luminous intensity becomes so low that it is not visible to the eye.