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Buvanapriya Dhandapani asked a question
Subject: Science, asked on on 9/1/17
why the magnification produced by a concave lens is always less than 1?
Shreyans Singh asked a question
Subject: Science, asked on on 9/1/17
A person needs a lens of power -5.5D for correcting his distant vision. For correcting his near vision he needs a lens of power +1.5D.Identify the disease he is suffering from. Find the focal length of the lens required for correcting i) distant vision ii ) near vision? 
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Tanish Patel asked a question
Subject: Science, asked on on 30/10/16
what is the difference between real and apparent depth?
Anushka Mithari asked a question
Subject: Science, asked on on 14/11/16
a beam of rays, parallel to the principle axis, is incident on a convex mirror. Show, on a diagram, the path of these rays after reflection from the mirror.
Varun Gupta asked a question
Subject: Science, asked on on 14/1/17
A bird flies down vertically towards a water surface. To  fish inside the water, vertically below the bird, why will the bird appear to:

1. Be farther away than its actual distance.
2. Move faster than its actual speed.
Preekshidh Pradeep asked a question
Subject: Science, asked on on 27/12/13

Is water a denser medium or rarer medium
Alvin asked a question
Subject: Science, asked on on 27/2/14

what total internal reflection
Monish Preetam asked a question
Subject: Science, asked on on 13/12/16
what are the three principal rays that are drawn to construct  the ray diagram for the image formed by a lens? draw diagrams to support your answer
Abhishek Singh asked a question
Subject: Science, asked on on 13/12/16
if the far point of eye lens is 10 m, find power of the lens required to correct the defect?
Sreelakshmi asked a question
Subject: Science, asked on on 11/12/14
what is optical density ?
Ahmed Raza asked a question
Subject: Science, asked on on 19/10/16
find the graph between deviation and angle of incidence for a plane surface
Sreelakshmi asked a question
Subject: Science, asked on on 13/12/14
Notice the figure 5.6 in the textbook of glass prism.
  1. what is the reason for the incident ray of light in the fig to reflect in this way ?
  2. if angle of incidence =30,what will happen to the light ray passing through the prism ?
Athira asked a question
Subject: Science, asked on on 8/10/14

what is optical densit???
Kartik asked a question
Subject: Science, asked on on 28/10/16
How do we read with our eyes closed ?(we can actually do it)
Athira asked a question
Subject: Science, asked on on 25/10/14

what is real image virtual image
Era Bhanot asked a question
Subject: Science, asked on on 15/9/16
Draw a diagram to locate the position of a convex lens kept between a candle and a screen separated by a distance of 90cm, so that an image of the candle, half the size of it, may be formed on the screen.  Deduce the focal length from the diagram. Please answer this question soon as I have an exam tomorrow.
Goutham asked a question
Subject: Science, asked on on 3/1/17
why is the eye lens not perfectly solid
Sumandhini asked a question
Subject: Science, asked on on 29/12/13

The image of the object is AB.

write two properties of the image.
Athira asked a question
Subject: Science, asked on on 7/10/14

what is normal??? how we can find it out
Yash Gupta asked a question
Subject: Science, asked on on 9/1/17
a concave lens of focal length 15cm forms an image 10cm from the lens how far is object placed from the lens draw a ray diagram
Nikita Singh asked a question
Subject: Science, asked on on 7/10/16
What kinds of images are formed by plane mirrors, concave mirrors and convex mirrors? {Real,Inverted or Virtual,Erect}
Aishwarya asked a question
Subject: Science, asked on on 14/10/16
​can we see image IN THE LENS formed by a convex lens when the object is placed between F and O
Alvin asked a question
Subject: Science, asked on on 27/2/14

what total internal reflection
Goutham asked a question
Subject: Science, asked on on 26/11/16
A ray of light enters flint glass from air.The refractive index of flint glass with respect to air is 1.65.What is the speed of light in flint glass if the speed of the light in air is 3*108.
Mallu asked a question
Subject: Science, asked on on 30/11/16
An object is placed 10 cm in front of a convex mirror and image formed is 15 cm behind the mirror . Find its focal length.
Aman asked a question
Subject: Science, asked on on 12/11/16
​difference beetween absolute and relative refractive index​
Digant Vijaykumar Jakhetiya asked a question
Subject: Science, asked on on 28/11/16
find the velocity of light in benzene with R.I of1.50 when it is travelling from a water medium whose absolute R,I is 1.30 ? state whether the ray diverges or converges while entering into benzene medium ? 
Gadha Jj asked a question
Subject: Science, asked on on 11/11/16
​in a 2 mark question for drawing a ray diagram, how many mark would you lose if you didn't draw the image as a dotted line?
Aakash Padmanabhan asked a question
Subject: Science, asked on on 31/10/16
Can light move an object
Shreyans Singh asked a question
Subject: Science, asked on on 8/1/17
​A student has difficulty in reading the blackboard while sitting on the last desk. From what defect of vision is he suffering? How can it be corrected? Draw ray diagram for it. 
 
Anushka Mithari asked a question
Subject: Science, asked on on 14/11/16
beams of light are incident through the holes c and d respectively .Which of the following could be inside the box
Arpit Jain asked a question
Subject: Science, asked on on 11/1/17
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  1. At what distance from a convex lens of focal length 20 centimeters  should a 60 cm tall object be placed so that it forms up an image at 15 centimeters from the lens
Varun asked a question
Subject: Science, asked on on 10/11/16
what is the position and nature of the image formed by concave and convex mirror when the object is placed beyond focus
Esther asked a question
Subject: Science, asked on on 10/1/17
What is the other name for concave lens
Shreya Choudhary asked a question
Subject: Science, asked on on 9/12/16
how can defects of vision   be corrected permanently??
I L A K K I Y A asked a question
Subject: Science, asked on on 11/1/17
A object is placed in front of a convex lens of focal length 15 cm . which of the following distance produces an image of same size as that of object . (a) 35 cm   (b) 30cm   (c) 20cm    (d) 10 cm 
Amber asked a question
Subject: Science, asked on on 26/11/16
If convex mirrors are used in magnifying glasses how is image formed magnified since convex mirror give only diminished images?
Drishti asked a question
Subject: Science, asked on on 8/11/16
a pool of water appears to be less deep than it actually is. WHY (5 marks ques.experts answer)
Snehal Gehi asked a question
Subject: Science, asked on on 21/11/16
The speed of light in water is 2.2*108​ m/s and 2*108m/s resp. What is the refractive index of water with respect to glass and glass with respect to water??
Rayyan Mansuri & 1 other asked a question
Subject: Science, asked on on 12/3/17
Is there any difference between optic nerve and optic nerve fibres in the human eye?
Kshitiz Anand asked a question
Subject: Science, asked on on 3/12/16
at what distance from a converging lens of focal lenght 12cm must an object be placed in order that an image of magnification 1 will be produced?Solve this using lens formula
 
Moiz Sma asked a question
Subject: Science, asked on on 9/12/16
please show rhe ray diagrams formed by convex lens all with their respective characteristics .
Mitali asked a question
Subject: Science, asked on on 4/11/16
please also draw the ray diagram for given situation please!!!!
Sharon Shaju asked a question
Subject: Science, asked on on 4/12/16
The speed of light in air is 3x108. If the refractive index of glass is 1.5, find the time taken by the light to travel a distance of 10cm in glass.
Rahul Kumar asked a question
Subject: Science, asked on on 16/12/16
dear sir/madam no link please ,please explain the relation between the refractive index and the speed of light properly​
Saptarshi Mondal asked a question
Subject: Science, asked on on 27/10/16
A thick glass beaker is filled with Alcohol and is suspended in air. A ray of light is made to enter the beaker with an angle of 30 degrees . Does refraction take place? If yes, where does refraction take place, with what angle does the refracted ray emerge from the beaker, is there any lateral displacement and with what speed does the ray of light emerge.  

Q. ​A thick glass beaker is filled with Alcohol and is suspended in air. A ray of light is made to enter the beaker with an angle of 30°. Does refraction take place? If yes, where does refraction take place, with what angle does the refracted ray emerge from the beaker, is there any lateral displacement and with what speed does the ray of light emerge.
 
Anmol Prasad asked a question
Subject: Science, asked on on 10/12/16
According to least distance of distinct vision one cannot see anything clearly before 25 cm but we can clearly read sentences in book which are even placed at 15 cm? Please explain this.
Ria Verma asked a question
Subject: Science, asked on on 4/11/16
how bending of refracted ray towards or away normal related to speed of light?
Sharon James asked a question
Subject: Science, asked on on 23/11/16
what is the nature of the image is formed by a concave mirror if the magnification produced by a mirror is:
1) 3
2) -0.75
Pranay Vangapally asked a question
Subject: Science, asked on on 9/10/16
a plano convex lens whose n=1.5 has a curved surface of radius 15cm.What is its focal length?
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