goIIT: IIT JEE AIEEE CET WBJEE VITJEE BITSAT IIIT AICET Engineering Entrance Experts, Student Discussion Community, IIT JEE Preparation Online

Hey! u have cheated this poem from ncert 9th book.

Welldone!!!!!!!!!!!!!!

Brilliant Tutorial is the best coaching institute for IIT-JEE. in India.

Re:DHAMAKA QUESTION!!! you r foolish

tell me the names of books

Hello Friends,

I am a class 10 student. My aim is IIT-JEE 2011. Should i use different books fr different chapters e.g. for trignometry, co-ordinate - 1 book ; for machanics - 1 book etc..

Hello Friends,

I am a class 10 student. My aim is IIT-JEE 2011. Should i use different books fr different chapters e.g. for trignometry, co-ordinate - 1 book ; for machanics - 1 book etc..

Hi ! I am a class 10th student. I have passed class 9th this year. I am starting preparation for IIT-2011. I am confused which book to use for Phy., Chem., and Maths. Please help me!!!!!!!!!!!!!

Que. - An object is kept at a distance from lens of power 10D which forms a virtual image at distance of 5cm from the lens. Calculate the distance at which the object is placed.

Que. - When a object is placed at a distance of 60 cm. from a convex mirror, the magnification produced is 0.5. Where should the object be placed to get a magnification of 1/3?

Que. - The image formed by a concave mirror is 1/2 in size of the object. If object is placed at 10 cm. from the mirror, where is the imaged formed?

Hey Friends,

I have a doubt in the topic refraction. Please help me in clearing this doubt. The que. is :

When a ray of light passes from rarer medium to denser medium, it bend towards the normal and when it passes from dense medium to rarer medium it bends away from the normal on the ending surface of both the medium.

But when a ray is passed through a lens, it should bend towards the normal on the ending surface of the air (means on the surface of the lens.) and where it goes out from the lens, there also it should bend away from the normal, since a lens is also a peice glass.

But in books, it is written that when a ray of light parallel to the principal axis is passed through the lens it bends from the pole and passes from the principal focus.

Please explain with reasons.