Question 1 :
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 2 :
A short sighted person can see distinctly only those objects which lie between $10cm$ and $100cm$ from him, The power of the spectacle lens required to see a distance object is
Question 4 :
A ray of light is incident on the surface of transparent medium at an angle of $45^o$ and is refracted in the medium at an angle of $30^o$. What will be the velocity of light in the transparent medium ? <br/>
Question 5 :
The image formed by a concave mirror is observed to be virtual, erect and larger than the object. Where should be the position of the object?
Question 6 :
A real and enlarged image can be obtained by using a:
Question 8 :
Choose the correct statement(s) related to the motion of object and its image in the case of  mirrors.
Question 9 :
A ray of light travelling in air is incident on the plane of a transparent medium. The angle of incident is $45^0$ and that of refraction is $30^0$. The refractive index of the medium with respect to air is:
Question 10 :
State whether true or false:A concave lens forms a magnified or diminished image depending on the distance of object from it.<br/>
Question 13 :
The relation between the linear magnification $m,$ the object distance $u$ and the focal length $f$ is
Question 14 :
If an object is placed at '$C$' of a concave mirror, the position of the image is ______
Question 17 :
A ray of light passing through the .......... of the lens, passes on undeviated.
Question 18 :
Under which of the following conditions will a convex mirror of focal length <i>f</i> produces an image ofreal object that is erect, diminished and virtual
Question 20 :
Light moves from air into water. The light makes an angle of $47^{\circ}$ with the normal in the air. What angle will it make with the normal in the water?<br>The index of refraction for air is $1.00$.<br>The index of refraction for water is $1.33$
Question 22 :
The angle of incidence for a ray of light passing through the centre of curvature of a concave mirror is :
Question 23 :
Which of the following mirrors forms an image which is virtual and smaller in size?
Question 24 :
What is the formula for spherical mirrors for object distance p and image distance q ?<br/>
Question 25 :
The focal length of a convex lens is $5\,cm$,where should the object be placed to get  a real image with same size as that of object:
Question 26 :
The radii of curvature of both the sides of a convex lens are $15cm$ and if the refractive index of material of the lens is $1.5$. Then focal length of lens in air is _______cm.
Question 29 :
No matter how far you stand from a mirror, your image appears erect. The mirror is likely to be<br>
Question 31 :
A straight line passing through the two centres of curvature of lens is called
Question 32 :
In case of a virtual and erect image, the magnification created by the mirror is
Question 34 :
A ray of light is incident perpendicularly on a glass slab. The angle of incidence is :
Question 36 :
What is the power of the lens, if the far point of a short sighted eye is $200\ cm$?
Question 39 :
The frequency of a light wave in a material is $2\times 10^{14} Hz$ and wavelength is $5000\overset {\circ}{A}$. The refractive index of material will be :
Question 40 :
Height of the image of an object on an principal axis produced by a convex lens is double the focal length of lens is $20 cm$, then image distance from the lens is:
Question 41 :
How does the power of a lens change if its focal length is doubled?<br>
Question 42 :
A man is unable to see closer than 1 m clearly.The power of lenses of his spectacles should be to see nearby object.
Question 43 :
The maximum magnification that can be obtained with a convex lens of focal length $2.5\ cm$ is ( the least distance of distinct vision is $25\ cm$)
Question 44 :
The relation among $u$, $v$ and $f$ for a mirror is:
Question 45 :
Choose the correct answer:<br>The nature of image formed by convex mirror is:
Question 46 :
State whether true or false : The degree of convergence of divergence of light rays achieved by a lens is expressed in terms of its power.
Question 47 :
The power of a convex lens of focal length $2$ metre will be:
Question 48 :
The magnification of an image by a convex lens is positive only when the project is placed:
Question 50 :
The power of a lens having a focal length of $1 cm$ is :<br/>