Advertisements
Advertisements
प्रश्न
Name the phenomenon due to which a swimming pool appears less deep than it really is.
Advertisements
उत्तर
This is due to the refraction of light.
APPEARS IN
संबंधित प्रश्न
If a ray of light goes from a rarer medium to a denser medium, will it bend towards the normal or away from it?
State whether the following statement is true or false:
Refraction occurs because light slows down in denser materials.
Why does a ray of light bend when it travels from one medium to another?
Fill in the following blank with suitable word:
Light travelling along a normal is ...............refracted.
What is meant by 'refraction of light'? Draw a labelled ray diagram to show the refraction of light.
Light travels more quickly through water than through glass.
Which is optically denser : water or glass?
With the help of a labelled diagram, explain why a tank full of water appears less deep than it actually is.
Light enters from air to glass having refractive index 1.50. What is the speed of light in the glass? The speed of light in vacuum is 3 × 108 m s−1.
List four characteristics of the image formed by a concave lens of focal length 20 cm when the object is placed at a distance of 40 cm from its optical centre.
A real image is formed by the light rays after reflection or refraction when they:
- actually meet or intersect with each other.
- actually converge at a point.
- appear to meet when they are produced in the backward direction.
- appear to diverge from a point.
Which of the above statements are correct?
The laws of reflection hold true for ______.
Light changes its direction when going from one transparent medium to another transparent medium. This is called _______.
State whether true or false. If false, correct the statement.
The angle of deviation depends on the refractive index of the glass.
Assertion and reasoning type
- Assertion: If the refractive index of the medium is high (denser medium) the velocity of the light in that medium will be small
- Reason: Refractive index of the medium is inversely proportional to the velocity of the light
What is refractive index?
If a beam of red light and a beam of violet light are incident at the same angle on the inclined surface of a prism from air medium and produce angles of refraction r and v respectively, which of the following is correct?
The angle of incidence from air to glass at the point O on the hemispherical glass slab is.
The bending of light as it passes from one medium to another is called ______.
Twinkling of stars and Mirage are the two phenomena occurring due to refraction.
Under what circumstances there won’t be any refraction of light when it enters from one medium to another?
