Question 1 :
If the refractive index of medium $b$ with respect to medium $a$ and that of medium $c$ with respect to medium b are given, then the refractive index of a medium $c$ with respect to a medium $a$ can be found by using the relation<br/>$n_{ca}\, =\, n_{ba}\, \times\, ........$<br/><br/>
Question 2 :
Fill in the blank. A _____ is a piece of transparent glass bounded by two spherical surfaces. 
Question 3 :
A spherical mirror and a thin spherical lens have each a focal length of $-15$ cm. The mirror and lens are likely to be :<br/>
Question 5 :
An object is placed somewhere in front of concave mirror. The focal length of the mirror is $10.0 cm$. The image for this object CANNOT be formed in which of the following locations?
Question 6 :
The power of a lens whose focal length is one metre is ______ dioptre.
Question 8 :
An object of height $1.5\ cm$ is placed on the axis of a convex lens of focal length $25\ cm$. A real image is formed at a distance of $75\ cm$ from the lens. The size of the image will be
Question 9 :
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 11 :
Concave lens is used in cameras to focus an image of film. Is the statement True or False?<br/>
Question 13 :
Light moves from air into water. The light makes an angle of $47^0$ 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 14 :
The ratio of the size of the image to the size of the object is known as
Question 16 :
A virtual image larger than the object can be produced by a
Question 17 :
State whether true or false:A concave lens forms a magnified or diminished image depending on the distance of object from it.<br/>
Question 18 :
State whether true or false.<br/>A convex mirror always forms a real image.
Question 20 :
To observe the hydra bud clearly. Raju should see it first under the low power lens and then under the high power lens in order to see 
Question 21 :
When a ray of light passes through a rectangular glass slab, the angle of emergence
Question 24 :
How does the power of a lens change if its focal length is doubled?<br>
Question 25 :
When light goes from a denser to a rarer medium the angle of refraction is:
Question 27 :
If the power of a lens is $0.1\;D$, its focal length is
Question 28 :
When the face is very close to the spoon the image formed by the outside bulged part?
Question 30 :
A person uses spectacles of power $+2\ D$. He is suffering from
Question 31 :
An object 20 cm from lens, has a virtual image at 10 cm from the object. The power of the lens is
Question 32 :
Assertion: If refractive index of one medium is equal to refractive index of second medium, then beam does not bend at all.
Reason: The bending of light does not depend on refractive indices of media.
Question 35 :
A thin convex lens of focal length $10\ cm$ is placed in contact with a concave lens of same material and of same focal length. he focal length of combination will be
Question 36 :
$ \dfrac{\sin i}{\sin r}  =$constant, the value of constant depends upon<br/>a) Pair of media <br/>b) Color of incident light<br/>c) Wave length <br/>d) Refracting nature of material<br/>
Question 37 :
A ray of light coming parallel to the principal axis after passing through a convex lens, has passed through its :
Question 38 :
A symmetric double convex lens is cut in two equal parts by a plane perpendicular to the principal axis. If the power of the original lens is $4 D$, the power of cut lens will be ________.
Question 39 :
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 40 :
State whether true or falseA convex mirror is used for obtaining a real and magnified image.
Question 41 :
State whether true or false : A concave lens will always give a virtual, erect and diminished image.
Question 43 :
A ray of light passing through the focus of a concave mirror will be :
Question 45 :
A rod is placed in a beaker of full of water. It appears to be bent inside the water. Which of the following property of light is responsible for the rod appearing to be bent?
Question 49 :
Which of the following is not a characteristic of image formed by a Concave lens ?
