Question 1 :
When a ray of light passes through a rectangular slab, made up of some transparent material other than glass, the emergent ray is
Question 3 :
The image of an object formed by a device isalways virtual and small. The device may be
Question 6 :
When the object is at focus of a concave mirror, the image is formed at
Question 8 :
A virtual image larger than the object can be produced by a
Question 10 :
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 12 :
If the light moving in a straight line bends by a small but fixed angle, it may be a case of<br>$(i)$reflection<br>$(ii)$refraction<br>$(iii)$diffraction<br>$(iv)$dispersion<br>
Question 13 :
State whether true or false.<br/>A convex mirror always forms a real image.
Question 15 :
"Value of refractive index remains same for light rays with different wavelength and for a particular material"
Question 16 :
A ray passing with which part of a lens emerges undeviated ?
Question 18 :
Which of the below is one of the laws of refraction?<br>
Question 19 :
State whether true or false.<br/>A concave mirror always forms erect and diminished images.
Question 20 :
A light ray travels at some angle (not head on) from water in a rectangular aquarium, through the glass side, and out into air . The indices if refraction for water, glass, and air are 1.33, about 1.6, and 1.0, respectively.<br/>Rank the material;s according to the angles of refraction  made by the light ray with the normal in each, greatest first.
Question 22 :
An object 20 cm from lens, has a virtual image at 10 cm from the object. The power of the lens is
Question 23 :
In case of a real and inverted image, the magnification of a mirror is:
Question 24 :
The focal length of a convex lens is $25cm$. Find its power with sign.<br/>
Question 27 :
Assertion: Magnetic field lines are continuous and closed.
Reason: Magnification of a convex mirror is always positive, but that of a concave mirror may be both positive or negative.
Question 28 :
A ray of light incident at a point on the principal axis of a convex lens passes undeviated through the lens. What special name is given to this point on the principal axis?<br>
Question 29 :
Which of the following term is not associated with a lens?
Question 30 :
If an object is placed at '$C$' of a concave mirror, the position of the image is ______
Question 33 :
The power of two convex lenses $A$ and $B$ are $8$ diopters and $4$ diopters respectively. If they are to be used as a simple microscope, the magnification of
Question 34 :
Which of the following is not a use of concave lens?
Question 37 :
What is the size of image when position of object is at F, position of image is at infinity and image formed through concave mirror?<br>
Question 38 :
The focal length of a combination of lenses formed with lenses having powers of $+2.50\ D$ and $-3.75\ D$ will be
Question 39 :
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 40 :
When light goes from a denser to a rarer medium the angle of refraction is:
Question 41 :
Fill in the blanks:Principal axis is also called ________ of the lens.
Question 42 :
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 46 :
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 47 :
Which of the following is not a characteristic of image formed by Concave lens ?
Question 48 :
Convex lens are used in eyeglasses to correct which type of defect?<br>
Question 49 :
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 51 :
Rays of light fall on a glass plate of refractive index $=\sqrt{3}$. If the angle between refracted ray and reflected ray is $90$, the angle of incidence is :
Question 52 :
Convex lens forms a real, point sized image at focus, the object is placed
Question 53 :
An object is placed at 20 cm in front of a concave mirror produces three times magnified real image. What is focal length of the concave mirror?
Question 54 :
A light ray passes from a material of low refractive index to one of high refractive index. Which of the pairs of quantities listed below describes the light ray as it strikes and passes through the interface between the two materials? Match the descriptions below with the statement that <i>best</i> describes the situation.<br/>A part of the light ray remains inside the low refractive index material:<br/>
Question 55 :
The glancing angle of incidence is $10^{\circ}$. What will be the glancing angle of reflection?
Question 57 :
The magnitude of focal length of a concave mirror is $f$. An object is placed at a distance $x$ from the focus and forms a real image. The magnification is:<br/>
Question 58 :
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?
