Question 2 :
When a beam of light from an object meets actually at a point after reflection from a mirror then the image formed is known as<br>
Question 3 :
When a  beam of light from an object appears to meet at a point after reflection from a mirror then the image formed is known as:<br/>
Question 5 :
What is the basic difference between a real image and a virtual image ?
Question 6 :
A movie projector forms real images. Why is it not inverted?
Question 7 :
Fill in the blank:<br/>A _____ image is one which can be obtained on a screen.
Question 12 : <p>An object has an image thrice of its original size when kept at<br>$8 cm$ and $ 16 cm$ from a convex lens focal length of the lens is</p>
Question 14 :
State whether the following statement is True or False. <br/>A concave lens is a divergent lens and is used in projectors
Question 16 :
Which of the following light color component is not present in thewhite light ?
Question 19 :
The splitting of white light into seven colors is known as ______.<br>
Question 20 :
The band spectra (characteristic of molecular species) is due to emission of radiation
Question 24 :
If a newton's colour disc composed of seven colours is rotated at high speed, it appears as
Question 25 :
Due to which phenomena the combination of red, green and blue forms the same white colour<br>
Question 28 :
Consider the following two statements $A$ and $B$ and identify thecorrect choice in the given answers<br>$A :$ Line spectra is due to atoms in gaseous state<br>$B :$ Band spectra is due to molecules<br>
Question 29 :
When a drop of water is introduced between the glass plate and plano-convex lens in Newton's rings system, the ring system<br>
Question 30 :
The colour are characterised by which of following character of light.
Question 31 :
Assertion: The colour of the green flower seen through red glass appears to be dark.
Reason: Red glass transmits only red light.
Question 34 :
A ray of light after passing through a medium were spread up into different colours. The phenomenon is called :
Question 35 :
The splitting of white light into several colours on passing through a glass prism is due to
Question 36 :
The splitting of white light into its colored components is called _____.
Question 37 :
Splitting of light into its constituent colours is known as :<br/>
Question 39 :
When white light enters a prism, it gets split into its constituent colours. This is due to:
Question 40 :
When white light passes through a dispersive medium, it breaks up into various colours. Which of the following is true?
Question 41 :
Clouds are white because of light scattering off of water droplets.
Question 43 :
The phenomenon due to which white light splits into seven colours on passing through a prism is called _________
Question 47 :
The phenomenon due to which light splits up into seven colours, on passing through an equilateral prism is called :
Question 48 :
The splitting of white light into several colours on passing through a glass prism is due to -
Question 49 :
Why do we study the Dispersion phenomenon using a glass prism and not a glass slab ?
Question 51 :
Assertion : If a plane glass slab is placed on the letters of different colours all the letters appears to be raised up to the same height.<br>Reason : Different colours have different wavelengths.
Question 52 :
The phenomenon of splitting of light into its component colours is _________.
Question 53 :
Assertion: Different colours travel with different speed in vacuum. <br>Reason : Wavelength of light depends on refractive index of medium.
Question 54 :
When light enters a dispersive medium, light wave of different wavelength travels with different velocities.
Question 55 :
A clock fixed on a wall shows time 04 : 25 : 37. Its image in a plane mirror shows :<br/>
Question 57 :
Assertion: Virtual image can be photographed.
Reason: Only a real image can be formed on a screen.
Question 58 :
It was the British scientist _______who discovered in 1666 that light consists of seven colours. Fill in the blank.
Question 59 :
Select the correct alternative:<br/>The property due to which a light ray striking a surface and returned back into the same medium is called  
Question 63 :
Fill in the blank:<br/>A student while solving a problem on convex mirror makes mistake and uses - sign for focal length, and proceeds. The solution for location of image will be ______ concave mirror.
Question 66 :
The light which refracts most while passing through a prism is
Question 67 :
A clock fixed on a wall shows time $04:25:37$. What time will its image in a plane mirror show?
Question 68 :
What causes difference in velocity of colours while passing from one medium to another through glass prism?<br>
Question 69 :
Assertion: The frequencies of incident, reflected and refracted beam of monochromatic light at the interface of two media are same.
Reason: The incident, reflected, refracted rays are coplanar.
Question 70 :
State which surface of a plane mirror reflects most of the light incidents on it: the front smooth surface or the back silvered surface?
Question 71 :
A man stands 2 m infront of a plane mirror. The mirror is moved 1 m towards the man while the man moves 50 cm away from the mirror. What is the distance between the images of the man?
Question 72 :
Which of the following statement is/ are correct?<br/>I. A person suffering from myopia can see distant objects clearly.<br/>II.. The bluish color of water in deep sea is only due to reflection of sky in water.<br/>III. In vacuum, all the colored of the light move with the same speed.<br/>IV. At noon, the sun appears white as light is least scattered
Question 73 :
An infinitely long rod lies along the axis of a concave mirror of focal length l. The near end of the rod is at distance u $>$ f from the mirror. Its image will have a length?
Question 74 :
Assertion: There is no dispersion of light refracted through a rectangular glass slab.
Reason: Dispersion of light is the phenomenon of splitting of a beam of white light into its constituent colours.
Question 75 :
In a room lighted by an electric bulb, it is found that the shadow of the ceiling fan hungin the centre is falling ona wall opposite to the door. What can you say about theposition of the bulb ?
Question 78 :
A piece of cloth looks red in sun light. If it is held in the blue portion of a solar spectrum, it will appear
Question 79 :
A virtual image larger than the object can be produced by a<br>
Question 80 :
Assertion: A ray of white light shows no dispersion on emerging from a glass slab although dispersion occurs inside the glass slab.
Reason: The velocity of light inside the glass slab is same for all different colours.
Question 81 :
Assertion: A convex lens of glass ($\mu$ = 1.5) behave as a diverging lens when immersed in carbon disulphide of higher refractive index ($\mu$ = 1.65)
Reason: A diverging lens is thinner in the middle and thicker at the edges.
Question 82 :
A point object is placed in front of a plane mirror. If the object and the mirror start moving away from each other with speed v along a straight line, then speed of the image with respect to mirror is
Question 83 :
In Newton's experiment the radii of the $m^{th}$ and $(m+4)^{th}$ dark rings are respectively $\sqrt{5}$mm and $\sqrt{7}$mm. What is the value of m?
Question 84 :
The surface of the spoon which is curved inwards can be approximated to be ($a$) .......... mirror and the surface of the spoon which is bulged outwards can be approximated to ($b$) ......... mirror.
Question 86 :
Assertion: All the materials always have the same colour, whether viewed by reflected light or through transmitted light.
Reason: The colour of material does not depend on nature of material.
Question 88 :
a diverging lens of focal length - $10$ cmis moving towards right with a velocity $5$ m/s. An object, placed on Principal axis is moving towards left with a velocity $3$m/s. The velocity of the image at the instant when the lateral magnification produced is $1/2$ is: (All velocities are with respect to ground)
Question 89 :
A driving mirror on a car is never concave because :
Question 90 :
When white light splits in seven colours, the phenomenon is called spectrum.
Question 91 :
Which of the following colours of light undergoes the least deviation while passing through a glass prism ?
Question 92 :
A concave lens of focal length 20 cm placed in contact with a plane mirror acts as a convex mirror of focal length
Question 94 :
A ray of light strikes a mirror at an angle of $\displaystyle { 60 }^{ o }$ to the normal. The mirror is then rotated $\displaystyle { 18 }^{ o }$ anticlockwise, What is the angle that the initial reflected ray and final reflected ray will have? 
Question 95 :
A ray of light moving from an optically rarer to a denser medium
Question 96 :
A part of sphere is cut and polished on both sides. One object is kept on each side of mirror. Is it possible for the twoimages to overlap?
Question 97 :
Consider the following statements : <br>A real image <br>1. can be formed on a screen <br>2. is always magnified and inverted <br>Which of the statements given above is/are correct?<br>
Question 99 :
A lens behaves as a converging lens in air and as a diverging lens in water. The refractive index of the material is
Question 100 :
A ray of light is incident on the plane mirror at rest. The mirror starts turning at a uniform acceleration of $\pi rad/s^2$ about an axis in plane of mirror. The reflected ray, at the end of $\dfrac{1}{4}s$ must have turned through
Question 101 :
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?
Question 102 :
A narrow of white light goes through a slab having parallel faces.
Question 103 :
A spherical convex surface separates object and image space of refractive index $1$ and $4/3$ respectively. If radius of curvature of the surface s $0.1\ m$, its power is
Question 104 :
Which type of an image is formed by a plane mirror?
Question 105 :
Image formed by a plane mirror is<br/>a) of same size as that of object<br/>b) at the same distance behind the mirror as the object in front<br/>c) erect, virtual<br/>Mark the correct statements:<br/>
Question 106 :
A perfectly reflecting mirror has an area of $1\ cm^{2}$. Light energy is allowed to fall on it for $1\ h$ at the rate of $10W/ cm^{2}$. The force that acts on the mirror is:
