Question 1 :
A plane glass plate is placed over a various coloured letters (violet, green, yellow, red). The letter which appears to raised more
Question 3 :
Which of the following is not a characteristic of the image formed by Convex lens ?
Question 4 :
A person uses spectacles of power $+2\ D$. He is suffering from
Question 6 :
If $f$ is the focal length of a lens, then the power of the lens is equal to
Question 7 :
The power of a lens is negative. State whether it is convex or concave?<br/>
Question 8 :
What is the power of the lens, if the far point of a short sighted eye is $200\ cm$?
Question 10 :
In case of a real and inverted image, the magnification of a mirror is:
Question 12 :
Which of the following are common to images formed by both Concave and Convex lens ?
Question 13 :
For an object at infinity, a concave mirror produces an image at its focus which is :
Question 16 :
Which of the following term is not associated with a lens?
Question 17 :
To construct a ray diagram, you need a minimum of  _______ ray(s) whose path(s) after refraction through the lens are known.
Question 18 :
A ray of light strikes the glass slab at an angle of $50^o$. Then the angle of incidence will be _____.
Question 19 :
A ray of light is incident normally on a plane glass slab. What will be the angle of refraction ?
Question 20 :
The mirror used in automobiles to see the rear field of view is
Question 21 :
Ratio of the size of the image to the size of the object is known as:
Question 22 :
What is the angle of incidence when a ray of light incident on a concave mirror from its centre of curvature?
Question 24 :
When a ray of light passes through a rectangular slab, made up of some transparent material other than glass, the emergent ray is
Question 25 :
The power of a lens having a focal length of $1 cm$ is :<br/>
Question 26 :
What is the nature of image formed by Concave lens ?
Question 28 :
Which of the following is not a characteristic of image formed by a Concave lens ?
Question 30 :
A ray of light passing through the .......... of the lens, passes on undeviated.
Question 31 :
The magnification of the image when an object is placed at a distance x from the principle focus of a mirror of focal length f is?
Question 32 :
Two thin lenses have combined power of $10\ D$. When separated by $20\ cm$ their equivalent power is $6.25\ D$. Their individual powers in $D$ are
Question 33 :
What would you use to obtain  a virtual and erect image?
Question 34 :
An object $5$ cm tall is placed $1$ m from a concavespherical mirror which has a radius of curvatureof $20$ cm. The size of the image is:<br>
Question 35 :
An object is kept at a distance of $20 cm$from a converging lens of focal length$10 cm$. What will be the magnification?
Question 36 :
A flim projector magnifies a flim of area $100 $ square centimeter on screen. If linear magnification is $4$ then area of magnified image on screen will be-
Question 37 :
A symmetric double convex lens is cut in two equal parts by a plane containing the principal axis. If the power of the original lens was 4 D, the power of a divided lens will be
Question 38 :
The glancing angle of incidence is $10^{\circ}$. What will be the glancing angle of reflection?
Question 39 :
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 40 :
Three convex lenses are available having focal lengths of $4 cm, 40 cm$ and $4 m$ respectively. Which one could be used as magnifying glass?
