Advertisements
Advertisements
प्रश्न
Using the curve, how do you infer that for given prism, the angle of minimum deviation δmin is unique for the given light?
Advertisements
उत्तर
In the position of minimum deviation δ = δmin,
i1 = i2 = i (say)
Where i1 is angle of incidence and i2 is angle of emergence.
Then δmin = 2i - A
For given prism and given colour of light, δmin is unique.
APPEARS IN
संबंधित प्रश्न
Choose the correct alternative and rewrite the following sentence.
A ray of light strikes the glass slab at an angle of 50°. What is the angle of incidence?
Draw a ray diagram to show the refraction of light through a glass slab and mark angle of refraction and the lateral shift suffered by the ray of light while passing through the slab.
A ray of light passes from glass into air. The angle of refraction will be:
(a) equal to the angle of incidence
(b) greater than the angle of incidence
(c) smaller than the angle of incidence
(d) 45°
How is the reflection of light ray from a plane mirror different from the refraction of light ray as it enters a block of glass?
How does the angle of minimum deviation produces by a prism change with increase in :
the refracting angle of prism?
An object is viewed through a glass prism with its vertex pointing upwards. It appears to be displaced upward. Explain the reason.
Fig 4.31 below shows a light ray of single colour incident normally on two prisms A and B. In each case draw the path of the ray of light as it enters and emerges out of the prism. Mark the angle wherever necessary.
What is the correct reason for blinking / flickering of stars? Explain it.
a) The blasts in the stars.
b) Absorption of star light by the atmosphere.
c) Motion of the stars.
d) Changing refractive index of gases in the atmosphere.
State the factors on which the angle of deviation depends.
Two parallel rays of Red and Violet travelling through the air, meet the air-glass boundary as shown in the above figure. Will their paths inside the glass be parallel? Give a reason for your answer.
