Advertisements
Advertisements
प्रश्न
Figure shows a ray of light as it travels from medium A to medium B. Refractive index of the medium B relative to medium A is
विकल्प
`sqrt3//sqrt2`
`sqrt2//sqrt3`
`1//sqrt2`
`sqrt2`
Advertisements
उत्तर
`sqrt3//sqrt2`
Explanation -
Given :
Angle of incidence i = 60°, Angle of refraction r = 45°
Using snell's law we get,
Refractive index of medium B relative to medium A,
`"n"_("BA") = ("sin i")/("sin r")`
`= ("sin" 60)/("sin" 45)`
= `(sqrt3/2)/(1/sqrt2)`
= `sqrt3/sqrt2`
APPEARS IN
संबंधित प्रश्न
State two uses of a plane mirror.
Explain the following term:
Reflected ray. Draw diagram/diagrams to show them.
Draw a diagram to show the reflection of a ray of light using a plane mirror. In the diagram, label the incident ray, the reflected ray, the normal, the angle of incidence and the angle of reflection.
Why are infinite images not seen when two plane mirrors are facing each other?
Copy the figure. By taking two rays from point A, show the formation of image. State four characteristics of the image.
Give two uses of concave mirror.
An object OA is placed on the principal axis of a concave mirror as shown in the figure. Copy and complete the diagram to show the formation of image.
Identify the following kind of beam of light.
Out of the following, choose the substance which is translucent medium:
Define the term Principle axis.
______Surface reflects the light well.
What happens when light hits a transparent object?
A beam of light is incident through the holes on side A and emerges out of the holes on the other face of the box as shown in the Figure. Which of the following could be inside the box?
Part of the eye which controls the light entering is called
Play with a mirror
Write your name with a sketch pen on a thin sheet of paper, polythene or glass. Read your name on the sheet while standing in front of a plane mirror. Now look at your image in the mirror.
