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All posts related to Light

Peppy Shubhi
Posted on Nov 07, 2013 5:06 PM

An eye specialist prescribes spectacles having a combination of convex lens of focal length 50 cm in contact with a concave lens of focal length 25 cm. The power of this combination of lenses (in dioptre) is

 
-2.5
-1.5
-0.04
-2.0
Please type your answer before submitting.
Peppy Shubhi

Explain dis 1

Aarya Mandal
Shared from Refraction of Light on Oct 11, 2013 4:35 PM

A superior mirage occurs if the air close to ground surface is much ____ than the air above.

 
hotter
cooler
denser
lighter
Please type your answer before submitting.
Shobha Shrestha

A

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Sandeep
Shared from Light on Feb 28, 2013 8:21 AM

Light appears to travel in a straight line because

 
the wavelength of light is very small
the velocity of light is very large
it consists of small particles
light is reflected by surroundings
Please type your answer before submitting.
Israr Farooquie

A

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Riya Goyal
Shared from Light - Reflection on Jan 26, 2013 1:35 AM

Which of the following is a linear magnification formula?

 
v =
m =
u = f
m =
Please type your answer before submitting.
Riya Goyal

Can u pls explain how the other modifications of mirror formula obtained??

Prem
Shared from Light-I on Jan 24, 2013 11:34 PM

A scooter driver wants to see the image of objects behind the scooter. Which of the following mirrors should he use as a side mirror of the scooter?

 
Plane mirror
Concave mirror
Convex mirror
Silvered glass
Please type your answer before submitting.
Prem

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