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प्रश्न
A wave has wavelength 50Å of State the speed in vacuum.
उत्तर
The speed of the wave will be 3 × 108 m/s in vacuum.
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संबंधित प्रश्न
State the cause of dispersion of white light passing through a glass prism. How did Newton show that white light of sun contains seven colours using two identical glass prisms. Draw a ray diagram to show the path of light when two identical glass prisms are arranged together in inverted position with respect to each other and a narrow beam of white light is allowed to fall obliquely on one of the focus of the first prism.
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
State the cause of dispersion of white light
Make two diagrams to explain refraction and dispersion.
When a white light ray falls on a prism, the ray at its first surface suffers ______.
The phenomenon of splitting of light into its component colours is ___________ .
Answer the following:
What do you mean by dispersion? Name the different colours of light in the proper sequence in the spectrum of light.
A student has to trace the path of a ray of light through a glass prism. List four precautions he should observe for better results.
Distinguish between an impure spectrum and a pure spectrum.
The splitting of white light into its component colours is called ____________.
