Advertisements
Advertisements
प्रश्न
Which is optically denser: water or air? Give reason
उत्तर
Denser medium are those in which speed of light gets reduced when light travels through that medium.
when light travels through water or glass it's speed get reduced hence they are optically denser medium.
WATER is optically DENSER as the speed of light is less in water than in air.
2.25 × 108 ms-1 < 3 × 108 ms-1
speed of light in Water < speed of light in Air.
APPEARS IN
संबंधित प्रश्न
The path of a ray of light passing through a glass prism is shown below:
In this diagram, the angle of prism, angle of incidence, angle of emergence and angle of deviation, respectively, have been represented by:
(A) O, Y, Z and N,
(B) P, Y, M and Z,
(C) O, X, M and Z,
(D) P, X, Z and N.
Draw a ray diagram to explain the term angle of deviation.
Draw a diagram to show the refraction of light through a glass prism. On this diagram, mark
(i) incident ray
(ii) emergent ray, and
(iii) angle of deviation.
What acts as tiny prisms in the formation of a rainbow?
State the speed of light in (a) air, (b) water, and (c) glass
A glass prism is able to produce the spectrum when white light passes through it, but a glass slab doesn’t produce any spectrum. Explain why it is so.
Write the range of wavelength of the infrared spectrum.
Observe the given figure and answer the following questions.
- Which colour light rays bend most?
- Which colour light rays bend least.
- What is the wavelength of violet light rays?
Name the scientist who was the first to use a glass prism to obtain the spectrum of sunlight.
State the correct sequence (1-7) of colours in the spectrum formed by the prisms A and B, shown in Figure 15.2.