मराठी
महाराष्ट्र राज्य शिक्षण मंडळएस.एस.सी (इंग्रजी माध्यम) इयत्ता १० वी

Write scientific reason. A pencil appears to be broken near the surface of water.

Advertisements
Advertisements

प्रश्न

Write scientific reason.

A pencil appears to be broken near the surface of water.

थोडक्यात उत्तर
स्पष्ट करा
Advertisements

उत्तर

  1. When one look at the portion of the pencil that is inside the water, light travels from water to air via glass.
  2. This light ray changes the medium and undergoes refraction.
  3. As a result, the pencil inside the water appears to be broken near the surface of water.
shaalaa.com
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 6: Refraction of light - Write scientific reasons [पृष्ठ २४]

APPEARS IN

संबंधित प्रश्‍न

The letter F is placed in front of a plane mirror:

  1. How would its image look like when seen in a plane mirror?
  2. What is the name of the phenomenon involved?

A wall reflects light and a mirror also reflects light. What difference is three in the way they reflect light? 


The boy walks towards the mirror at a speed of 1 m/s. At what speed does his image approach him?


State and explain the laws of reflection of light at a plane surface (like a plane mirror), With the help of a labelled ray-diagram. Mark the angles of 'incidence' and 'reflection' clearly on the diagram. If the angle of reflection is 47.5°, what will be the angle of incidence?


 Explain why, though both a plane mirror and a sheet of paper reflect light but we can see the image of our face in a plane mirror but not in a sheet of paper.


 The image in a plane mirror is virtual and laterally inverted. What does this statement mean?


Explain how to read the following message which was found on some blotting paper:


If a ray of light goes form a denser medium to a rarer medium, will it bend towards the normal or away from the normal?


A ray of light goes from water into air. Will it bend towards the normal or away from the normal?


When a ray of light passes from air into glass, is the angle of refraction greater than or less than the angle of incidence?


Which phenomenon of light makes the water to appear shallower than it really is?


State whether the following statement is true or false:

Refraction occurs because light slows down in denser materials.


Fill in the following blank with suitable word: 

Light travelling along a normal is ...............refracted.


Light travelling from a denser medium to a rarer medium along a normal to the boundary:

(a) is refracted towards the normal
(b) is refracted away from the normal
(c) goes along the boundary
(d) is not refracted


A vertical ray of light strikes the horizontal surface of some water: 

What is the angle of refraction? 


What do you understand by refraction of light?


Draw a diagram showing the refraction of a light ray from water to glass. Label on it the incident ray, the angle of incidence (/), and the angle of refraction (r)


What is the cause of refraction of light when it passes from one medium to another?


List in proper sequence the steps of the experiment for determining the approximate focal length of a given concave mirror by obtaining the image of a distant object.


Due to _______ pencil looks bent in water, in the given experiment.


Right or wrong sentence.

The incident rays and refracted rays are on opposite sides of the column.


Write a scientific reason.

The coin disappears in a vessel as it is seen from a specific location. But as soon as the water is poured into the vessel to a certain level, the coin appears.


Observe the given figure and name the following.

Ray AB  
Ray NM  
Ray MD  
∠ r  

Observe the given figure and write appropriate phenomenon of light in the box.


The deviation of light ray from its path when it travels from one transparent medium to another transparent medium is called ______.


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.


Light bends as it passes from one medium to another. What is this phenomenon called?


The bending of light as it passes from one medium to another is called ______.


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


When a ray of light travels normal to the given surface, then the angle of refraction is ______.


When a light ray passes from a rarer medium to a denser medium, it bends:


When light travels from a rarer medium to a denser medium, its speed:


According to the first law of refraction, the incident ray, the refracted ray, and the normal at the point of incidence:


According to the second law of refraction, for a given pair of media, the ratio of the sine of the angle of incidence to the sine of the angle of refraction:


In the formula for absolute refractive index \[n = \frac{c}{v}\], the quantity c represents:


A larger refractive index of a medium means that light travels:


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×