Question Text
Question 2 :
Which of the following is not a characteristic of image formed by a Concave lens ?
Question 3 :
Convex lens are used in eyeglasses to correct which type of defect?<br>
Question 4 :
A ray of light coming parallel to the principal axis after passing through a convex lens, has passed through its :
Question 5 :
Transparent medium bounded by two refracting surfaces in which at least one of these is curved is a property of:
Question 6 :
Which one of the following materials cannot be used to make lens?
Question 7 :
The focal length of a lens can be expressed in :
Question 9 :
<br>Which is the human organ which behaves like an optical instrument having lens and a screen?
Question 11 :
<span>A person needs a lens of power $-4.5\ D$ for correction of her vision. </span>What is the nature of the corrective lens?<br/>
Question 12 :
The image of an object formed by a convex lens when the object is placed between the lens and the focal point is -
Question 13 :
The refractive indices of glass and quartz w.r.t. air are 3/2 and 12/5 respectively. The refractive index of quartz w.r.t. glass is:
Question 14 :
Three convex lenses are available having focal lengths of $4 cm, 40 cm$ and $4 m$ respectively. Which one could be used as magnifying glass?