Question Text
Question 1 :
Convex lens are used in eyeglasses to correct which type of defect?<br>
Question 3 :
A point on the principal axis of a lens, to which light rays parallel to the principal axis converge after passing through the lens, is ............
Question 4 :
The focal length of a convex lens is $25cm$. Its power will be:
Question 5 :
A glass slab has two long parallel faces. Light ray is incident on the glass slab and trace of light ray is drawn. Now glass slab is shifted parallel to the parallel faces. What will be the effect on the trace of light?
Question 6 :
The image obtained while finding the focal length of convex lens is...................
Question 7 :
The reflecting surface is given by $y = \dfrac{10L}{\pi} \sin \dfrac{\pi x}{5L}$. The co-ordinates of the point where a horizontal ray becomes vertical after reflection is:
Question 8 :
A concave shaving mirror has a radius of curvature of 35.0 cm. It is positioned so that the (upright) image of a mans face is 2.50 times the size of the face. How far is the mirror from the face?
