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प्रश्न
State two properties of ultraviolet radiation which differ from visible light.
What are the two properties of ultraviolet radiation that are different from that of visible light?
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उत्तर
- Ultra-violet radiations are of wavelengths shorter than that of visible light.
- Ultraviolet radiation is more chemically active than visible light.
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संबंधित प्रश्न
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
Draw a ray diagram to show the dispersion of white light.
Name the process which is involved in the formation of a rainbow.
What are the seven colours seen in a rainbow?
Why do you not see a spectrum of colours when light passes through a flat pane of glass?
In the spectrum of white light by a prism, the colour at the extreme end opposite to the base of prism is ______.
In an experiment to trace the path of a ray of light through a glass prism for different values of angle of incidence a student would find that the emergent ray:
(A) is parallel to the incident ray
(B) perpendicular to the incident ray
(C) is parallel to the refracted ray
(D) bends at an angle to the direction of incident ray
______ colour is deviated the least in the spectrum of white light obtained with a glass prism.
State True or False:
"Wavelength of red light is close to 700 nm.”
Observe the given diagram and answer the questions:
- Name the process shown in the figure.
- Name the colour that deviates the most.
- Name the colour that deviates the least.
- Name any one phenomenon in nature which is based on the above process.
- Define ‘spectrum’.
