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
पर्याय
`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
Fill in the blank
We are able to see the objects around us due to _________, reflection.
Select the correct alternative
The image formed by a plane mirror is
What do you mean by the term reflection of light ?
Wirte down the letter C and I as seen in a plane mirror.
If the angle between the plane mirror and the incident ray is 40∘, what are the angles of incidence and reflection?
A light ray is incident normally on a plane mirror. (a) What is its angle of incidence?
What do you understand by the Diffused Light?
Copy the figure. By taking two rays from point A, show the formation of image. State four characteristics of the image.
Show an incident ray AO and the normal ON a plan mirror. draw the reflected ray and then find the angle between the incident and reflected rays.
Find the odd one.
sun, candle, torch, pen
Reflection occurs , when the light
Say TRUE or FALSE
We see a book because it reflects the light that falls on its surface
State the direction of incident ray which after reflection from a spherical mirror retraces its path. Give reason for your answer.
In a completely dark room, if you hold up a mirror in front of you, will you see a reflection of yourself in the mirror?
Which of the following ray diagrams is correct for the ray of light incident on a lens shown in figure?
 |
 |
| A | B |
 |
 |
| C | D |
Match the following:
| 1. | Vegetable oil | a. | Transparent |
| 2. | Glass | b. | Translucent |
| 3. | Wood | c. | Waterproof |
| 4. | Aluminum foil | d. | Opaque |
Match the following:
| 1. | Rubber | a. | Erect |
| 2. | Greased paper | b. | Inverted |
| 3. | Real image | c. | Opaque medium |
| 4. | Virtual image | d. | Translucent medium |
What kind of surface reflects light?
