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what is the difference between a ray and beam of light?
What controls the time of exposure i) In eye and ii) In Camera.
if we decrease the thickness of the lens why does the focal length increase?
what is law of refraction?
WHAT ARE THE LAWS OF REFRACTION?
a convex lens is used in the eye.a convex lens produces inverted images*.so,y r v able to see the world inverted?
A small electric bulb is placed at the focus of a convex lens. when the bulb is switch on does the lens produce a convregent, divergent or a parallel beam of light? draw the necessary ray diagram
Explain Newtons colour disc. Which colour will be seen when Newtons colour disc is rotated with high speed ?
What is sine? Explain please.
Why a straight rod appear s bent in water
Why does the sky appear blue?
Find the speed of light in diamond if absolute refractive index of diamond is 2.5
What is Snell's Law?
State laws of refraction?
relation between angle of incidence+angle of emergence=angle of prism+delta
pls prove it . and i request such informations to be added on meritnation .
Please explain the first law of refraction.
What is pole?
Fill in the blanks .
1. If the object is kept at the focal point of a convex lens, the image is formed at ___________ .
2. Real image is obtained only in ___________ lens.
3. For aconcave lens , the image formed is always ______________ irrespective of the position of object .
If the refractive index of water for light going from air to water be 1.33 ,what will be the r.i. For ligh going from water to air?
WHAT IS THE DIFFERENCE BETWEEN SPHERICAL MIRROR AND SPHERICAL LENS?
why does the ray of light change its direction or bends as it moves frm one medium to another why doesn't it continue on the same path ?
During sunrise n sunset the sun is seen even when it is slightly below the horizon. WHY????
A Camera takes negative Photographs. What is the meaning of the word "Negative" in this statement ?
WHAT IS RAINBOW?HOW IS IT FORMED?
reflection of light
uses of concave lens
"Two plane mirrors AB & CD each of length 2m are arranged parralel to each other 31/2m apart & a ray of light is incident at point 'A' of the mirror AB .How many reflections does the ray undergo? What is the distance travelled by the ray of light between the two mirrors ?what is the angle of deviation? " Please explain in detail.
can you explain me first "Law of Refraction"
what are chromatic abbrevaton?
Fill in the blanks .
1. _________ lens gives __________ image of same size.
the incident ray and the reflected ray from a mirror are mutually perpendicular to each other . Find the angle of incidence .
i learnt in 7 class that angle i = angle r for the first law of reflection but over hear they tell the lirst law of reflection is Snell’s law how can you [lease tell me please
Pls explain me refraction trough pism
what is principle focus
what is foccal length
we have studied in our previous class that light travels in straight line n but here it is written that light can bent how is it
can you explain me refraction through a prism using a diagram.
The refractive index of water of kerosene , turpentine and water are 1.44 , 1.47,1.33 respectively . In which of these materials does light travel fastest and slowest?
What is "Len's Formula" ? Why is Positive & Negative Signs used Before the Numbers while solving the problems involving the Application of This Formula?
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