Question 1 :
The phenomenon of scattering of light by fine particles is called _____ :<br/>
Question 3 :
Which of the following quantities changes during the process of scattering?
Question 4 :
A defect, in which a person suffering from is unable to see in all directions equally well, is:
Question 5 :
The color of scattered light depends on ____ of the scattering particles.
Question 6 :
The inability among the elderly to see nearby objects clearly because of the weaking of the ciliary muscles is called
Question 7 :
At sun rise of sunset, the sun looks more red than at mid-day because
Question 9 :
The path of a beam of light is invisible in which solution?
Question 10 :
At sun rise of sunset, the sun looks more red than at mid-day because
Question 11 :
What is the power of the lens, if the far point of a short sighted eye is $200\ cm$?
Question 12 :
A ray of light passing through the .......... of the lens, passes on undeviated.
Question 13 :
A man sees a smallstationary fish deep in a very clear lake and shoots it accurately. He will
Question 15 :
A virtual image larger than the object can be produced by a
Question 16 :
The focal length of a convex mirror is $20\ cm$ its radius of curvature will be
Question 17 :
On the basis of their experiment, "To trace the path of a ray of light through a rectangular glass slab," students of a class arrived at which one of the following conclusions :
Question 18 :
The power of a lens whose focal length is one metre is ______ dioptre.
Question 19 :
If an object is placed at '$C$' of a concave mirror, the position of the image is ______
Question 21 :
The image formed in case of a convex mirror is always ________ .
Question 23 :
A person uses spectacles of power $+2\ D$. He is suffering from
Question 25 :
If the focal length of a lens is $50\;cm$, its power would be
Question 29 :
Convex lens are used in eyeglasses to correct which type of defect?<br>