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Asked by Chayanika Guin

Nov 16, 2013

what is the derivation of mirror formula of concave and convex mirror?

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Answer (6)

Asked by Nidhi Maithani

Dec 3, 2014

What is the difference between a virtual image and a real image?

real image is formed when the light rays really meet, whereas virtual image is formed when the light rays appear to meet.

Answer (15)

Asked by Unmukt

Jan 19, 2014

uses of convex lens in daily life.,.

It is converging lens . Used in magnifying g...

Answer (6)

Asked by Piyush chavan

Mar 3, 2015

The absolute refractive indices of glass and water are 4/3 & 3/2, respectively. If speed of light in glass is 2x108 m/s , calculate the speed of light in vacum and water.( 2015 Boards Que. )

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Answer (3)

Asked by V.m.hameed

Jan 28, 2015

If the speed of light in vacuum is 3x10⁸ m/s, find the speed of light in a medium of absolute refractive index 1.5.

Answer.

    Refractive index of a medium = Speed of light in vacuum/Speed of light in a medium

1.5 = 3 x 108

Answer (2)

Asked by Neeraja Babu Babu

Mar 3, 2015

If the image formed by a mirror for all positions of the object placed in front of it is always erect and diminished, what type of mirror is it ? Draw a ray diagram to justify your answer. Where and why do we generally use this type of mirror?

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Answer (2)

Asked by Venkatesh

Nov 21, 2013



why does the ray passing through the centre of curvature of a concave mirror retraces it's  path.

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Answer (2)

Asked by David

Dec 5, 2014

An object 5 cm in size is placed at a distance of 20 cm from the concave mirror of focal length 15 cm. At what distance from the mirror should a screen be placed to get a sharp image? Also find the height of the image.

Object-size, h = + 5.0 cm;
Object-distance, u = – 20.0 cm;
Focal length, f = –15.0 cm;
Image-distance, v = ?
Image-size, h′ = ?
Mirror formula is ...

Answer (2)

Asked by Sai Bhargav Karnati

Dec 4, 2014

What for concave and convex mirrors and lenses are used?

Uses of Concave Mirrors
  • Concave mirrors are used as shaving mirrors to see a larger image of the face.
  • Dentists use concave mirrors to view the back of the tooth. ENT doc...

Answer (1)

Asked by Santosh kumar

Feb 24, 2014

the phenomenon of twinkling the stars took place why ?

The phenomenon that causes stars to twinkle is atmospheric refraction. That is, the air above us is a big ocean of not very dense fluid that has a small bending effect on light that passes through it. If it wer...

Answer (3)

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