Question 1 :
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 2 :
A ray of light travels from air to glass at an angle of incidence of $37^{\circ}$, the angle of refraction is $24^{\circ}$. What is the refractive index of glass?<br/>(Given: $\sin 37^{\circ} = 0.60, \sin 24^{\circ} = 0.40)$
Question 4 :
Due to refraction, when seen from outside,a coin placed under water in a bowl, appears to
Question 5 :
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 7 :
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 8 :
If in a plano-convex lens, the radius of curvature of the convex surface is 10 cm and the focal length of the lens is 30 cm, then the refractive index of the material of lens will be
Question 9 :
A converging lens has a focal length of $50 cm$. The power of the lens is
Question 11 :
In passing through a boundary, refraction will not take place if
Question 12 :
A ray of light passing through the focus of a concave mirror will be :
Question 14 :
<br>Which is the human organ which behaves like an optical instrument having lens and a screen?
Question 15 :
A camera is an optical instrument which makes use of a :
Question 17 :
Lens A produces a magnification of -0.8 whereas lens B produces a magnification of +0.8. Which one of the following applies to lenses A and B?
Question 18 :
A photograph of a horse is taken by a camera whose lens has been painted with black stripes. The photograph will be of a :
Question 19 :
Which of the following are common to images formed by both Concave and Convex lens ?
Question 21 :
A virtual image larger than the object can be produced by a
Question 22 :
Focal length of a lens is 50 cm. Its power would be :
Question 23 :
State whether the following statement is True or False. <br/>A real image can be obtained by putting an object at any distance from a convex mirror
Question 24 :
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 25 :
Which of the following is not a characteristic of image formed by a Concave lens ?
Question 26 :
State the direction of incident ray which after reflection from a spherical mirror retraces its path:
Question 28 :
Object when placed at ________ in front of concave mirror magnification of -1 is obtained.
Question 29 :
A ray passing with which part of a lens emerges undeviated ?
Question 30 :
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 31 :
Fill in the blank spaces by choosing the correct word.A prism is a piece of transparent material having three rectangular surfaces and .......... triangular surfaces.
Question 33 :
When Astronauts fly at higher altitude, the sky appears dark because ;
Question 34 :
The angle between the two refracting surface of a prism is called angle of :<br/>
Question 35 :
Long-sightedness is caused by the eyeball being too short. It can be corrected by the use of a :
Question 37 :
Braille writer slate and stylus is a type of resource for blind people that is called tactual aid