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Question
What do you understand by the term spectrum?
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Solution
The colour band obtained on a screen on passing white light through a prism is called the spectrum.
RELATED QUESTIONS
After tracing the path of a ray of light through a glass prism a student marked the angle of incidence (∠i), angle of refraction (∠r) angle of emergence (∠e) and the angle of deviation (∠D) as shown in the diagram. The correctly marked angles are :
(A) ∠i and ∠r
(B) ∠i and ∠e
(C) ∠i, ∠e and ∠D
(D) ∠i, ∠r and ∠e
Make two diagrams to explain refraction and dispersion.
Which is refracted most by a prism : red light or violet light? Explain why?
Why do you not see a spectrum of colours when light passes through a flat pane of glass?
The speed of light in air or vacuum is
Define the term dispersion of light.
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.
Draw a labelled diagram: Dispersion of light through a prism.
Match the Columns:
| Column ‘A’ | Column ‘B’ |
| The wavelength of red light | (a) 600 nm |
| (b) 700 nm | |
| (c) 500 nm |
What is Newton’s disc?
