If a ray of light enters from alcohol to air. The refractive index of alcohol is 1.36. Calculate the speed of light in alcohol with respect to air.
Download our app for free and get started
Speed of light in vacuum $=3 \times 10^8 m / s$.
$\text { Refractive index }(\mu)=\frac{c \text { (speed of light in vaccum) }}{v \text { (speed of light in alcohol) }}$
$\Rightarrow 1.36=\frac{3 \times 10^8}{\text { speed of light in alcohol }}$
$\Rightarrow$ speed of light in alcohol $=\frac{3 \times 10^8}{1.36}$
$\therefore$ speed of light in alcohol $=2.21 \times 10^8 m / s$
speed of light in alcohol with respect to air is $2.21 \times 10^8 ms^{-1}$
$\text { Refractive index }(\mu)=\frac{c \text { (speed of light in vaccum) }}{v \text { (speed of light in alcohol) }}$
$\Rightarrow 1.36=\frac{3 \times 10^8}{\text { speed of light in alcohol }}$
$\Rightarrow$ speed of light in alcohol $=\frac{3 \times 10^8}{1.36}$
$\therefore$ speed of light in alcohol $=2.21 \times 10^8 m / s$
speed of light in alcohol with respect to air is $2.21 \times 10^8 ms^{-1}$
Download our appand get started for free
Experience the future of education. Simply download our apps or reach out to us for more information. Let's shape the future of learning together!No signup needed.*
Similar Questions
- 1View SolutionList two possible ways in which a concave mirror can produce a magnified image of an object placed in front of it. State the difference, if any, between these two images.
- 2View SolutionA boy with a mouth 5cm wide stands 2m away from a plane mirror. Where is his image and how wide is the image of his mouth?
- 3View SolutionThe lens A produces a magnification of, -0.6 whereas lens B produces a magnification of +0.6:
- What is the nature of lens A?
- What is the nature of lens B?
- 4View SolutionIdentify the device used as a spherical mirror or lens in following cases, when the image formed is virtual and erect in each case.Object is placed between the focus and device, image formed is enlarged and on the same side as that of the object.
- 5View SolutionDiscuss the case when a convex lens forms a virtual and enlarged image.
- 6View SolutionA ray of light is incident on a convex mirror as shown. Redraw the diagram and complete the path of this ray after reflection from the mirror. Mark angle of incidence and angle of reflection on it.
- 7View SolutionDraw a ray diagram to show the formation of a real magnified image by a convex lens. (In your sketch the position of object and image with respect to the principal focus of lens should be shown clearly).
- 8View SolutionWhat do you understand by the power of a lens? Name one factor on which the power of a lens depends.
- 9View SolutionTo find-the image-distance for varying object-distances in case of a convex lens, a student obtains on a screen a sharp image of a bright object placed very far from the lens. After that he gradually moves the object towards the lens and each time focuses its image of the screen.
- In which direction - towards or away from the lens, does he move the screen to focus the object?
- What happens to the size of the image - does it increase or decrease?
- What happen when he moves the object very close to the lens?
- 10View SolutionDescribe with the help of a diagram, the nature, size and position of the image formed when an object is placed beyond the centre of curvature of a concave mirror.