मराठी

A Ray of Light Travelling in Air is Incident on a Rectangular Glass Block and Emerges Out into the Air from the Opposite Face. Draw a Labelled Ray Diagram to Show the Completer Path of this Ray of Light. Mark the Two Points Where the Refraction of Light Takes Place. What Can You Say About the Final Direction of Ray of Light?

Advertisements
Advertisements

प्रश्न

A ray of light travelling in air is incident on a rectangular glass block and emerges out into the air from the opposite face. Draw a labelled ray diagram to show the completer path of this ray of light. Mark the two points where the refraction of light takes place. What can you say about the final direction of ray of light?

Advertisements

उत्तर

  

Here, light ray changes its direction or refracts at point A when it travels from air to glass. The ray changes its direction again at point B when it travels from glass to air.
The final direction of light ray, i.e., BX will be parallel to the direction OAY in which it enters the glass block.

shaalaa.com
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 2: Refraction of Light - Exercise 1 [पृष्ठ २२०]

APPEARS IN

लखमीर सिंह Physics [English] Class 10
पाठ 2 Refraction of Light
Exercise 1 | Q 21 | पृष्ठ २२०

व्हिडिओ ट्यूटोरियलVIEW ALL [3]

संबंधित प्रश्‍न

A ray of light strikes a plane mirror such that its angle of incidence is 30°. What angle does the reflected ray make with the mirror surface?


What is lateral inversion? Explain by giving a suitable example.


 Which type of reflection of light leads to the formation of images?


What type of reflection of light takes place from a cinema screen?


Define the following terms used in the study of reflection of light by drawing a labelled ray-diagram: 

(a) Incident ray
(b) Point of incidence
(c) Normal
(d) Reflected ray
(e) Angle of incidence
(f) Angle of reflection


The image formed by a plane mirror is :

(a) virtual, behind the mirror and enlarged.
(b) virtual, behind the mirror and of the same size as the object.
(c) real, at the surface of the mirror and enlarged.
(d) real, behind the mirror and of the same size as the object.


A ray of light strikes a plane mirror PQ at an angle of incidence of 30°, is reflected from the plane mirror and then strikes a second plane mirror QR placed at right angles to the first mirror. The angle of reflection at the second mirror is ______.


A ray of light travelling in glass emerges into air. State whether it will bend towards the normal or away from the normal.


A ray of light passes from air into a block of glass. Does it bend towards the normal or away from it?


How does the light have to enter the glass: 

 to produce a large amount of bending?


What do you understand by refraction of light?


We can see the sun even when it is little below the horizon because of ______.


Lights of different colours are used as signal for safety transport. From these, the wavelength of red light is _______ nm.


Write scientific reason.

The bottom of a pond appears raised.


Noor, a young student, was trying to demonstrate some properties of light in her Science project work. She kept ‘X’ inside the box (as shown in the figure) and with the help of a laser pointer made light rays pass through the holes on one side of the box. She had a small butter-paper screen to see the spots of light being cast as they emerged.

Her friend noted the following observations from this demonstration:

  1. Glass is optically rarer than air.
  2. Air and glass allow light to pass through them with the same velocity.
  3. Air is optically rarer than glass.
  4. Speed of light through a denser medium is faster than that of a rarer medium.
  5. The ratio: sin of angle of incidence in the first medium to the ratio of sin of angle of refraction in the second medium, gives the refractive index of the second material with respect to the first one.

Which one of the combinations of the above statements given below is correct.


A water tank appears shallower when it is viewed from the top due to refraction. 


Assertion: The air bubble shines in water.
Reason: Air bubble shines due to the refraction of light.


Match the following:

  Column I   Column II
1. r > 90 a. Light gazes at the surface of separation between the two modes.
2. r = 90 b. No refraction.
3. r < 90 c. Refracted ray away from the normal

A ray of light starting from diamond is incident on the interface separating diamond and water. Draw a labelled ray diagram to show. the refraction of light in this case.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×