Advertisements
Advertisements
प्रश्न
Write an Explanation.
Critical angle
Advertisements
उत्तर
For a particular value of i (angle of incidence) for which, the value of r (angle of refraction) becomes equal to 90°, is called the critical angle.
APPEARS IN
संबंधित प्रश्न
In the following diagram, the path of a ray of light passing through a glass prism is shown:
In this diagram the angle of incidence, the angle of emergence and the angle of deviation respectively are (select the correct option):
(A) X, R and T
(B) Y, Q and T
(C) X, Q and P
(D) Y, Q and P
Study the following diagrams in which the path of a ray of light passing through a glass prism as traced by four students P, Q, R and S is shown:
The student who has traced the path correctly is
(A) P
(B) Q
(C) R
(D) S
A student is observing a diagram showing the path of a ray of light passing through a glass prism. He would find that for all angles of incidence the ray of light bends:
In the following diagram the correctly marked angles are :
(a) ∠A and ∠e
(b) ∠i, ∠A and ∠D
(c) ∠A ∠r and ∠e
(b) ∠A ∠r and ∠D
What is spectrum?
Name the process which is involved in the formation of a rainbow.
The splitting of white light into its constituent colours is called .............
The frequency range of visible light is from 3.75 × 1014 Hz to 7.5 × 1014 Hz. Calculate its wavelength range. Take speed of light = 3 × 108 m/s.
In which of the following four diagrams is the correct path of a ray of light passing through a glass prism shown ?
A wave has wavelength 50Å of State the speed in vacuum.
Which characteristic property of light is responsible for the blue colour of the sky?
Distinguish between an impure spectrum and a pure spectrum.
Write the range of wavelength of the visible spectrum.
In the figure, a beam of light consisting of three colours blue, red, and yellow is incident on a prism and on a rectangular glass block respectively. Complete the diagram by drawings of the refracted and emergent rays.
The sunlight can be split into its constituent colors using ______.
Which of the following is a natural phenomenon which is caused by the dispersion of sunlight in the sky?
The phenomena of light involved in the formation of rainbow are ______.
Why do we see a rainbow in the sky only after rainfall?
Assertion: We can see the rainbow in the sky when the rain starts falling after a spell of bright sunlight.
Reason: The rainbow is formed due to the dispersion of light.
A prism of refractive index `sqrt2` and refracting angle A produces minimum deviation δm of a ray on one face at an angle of incidence 45°, The values of A and δm are, respectively ______.
