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Question
A wave has wavelength 50Å of State the speed in vacuum.
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Solution
The speed of the wave will be 3 × 108 m/s in vacuum.
RELATED QUESTIONS
Study the following figure in which a student has marked the angle of incidence (∠i), angle of refraction (∠r), angle of emergence (∠e), angle of prism (∠A) and the angle of deviation (∠D). The correctly marked angles are
(a) ∠A and ∠i
(b) ∠A, ∠i and ∠r
(c) ∠A, ∠i, ∠e and ∠D
(d) ∠A, ∠i, ∠r and ∠D
Which of the following colour of white light is least deviated by the prism?
(a) green
(b) violet
(c) indigo
(d) yellow
Which is optically denser: water or air? Give reason
You are given a disc divided into seven sectors with colours violet, indigo, blue, green, yellow, orange and red in them. What would be its colour when it is rotated rapidly?
When we place a glass prism in the path of a narrow beam of white light a spectrum is obtained. What happens when a second identical prism is placed in an inverted position with respect to the first prism? Draw a labelled ray diagram to illustrate it.
Make the correct choice for each of the following:
Which one of the following Fig correctly shows the path of the ray through the glass block?
How can the presence of ultraviolet radiation be detected?
Assertion: We can see the rainbow in the sky when the rain starts falling after a spell of bright sunlight.
Reason: The rainbow is formed due to the dispersion of light.
State True or False:
"Wavelength of red light is close to 700 nm.”
State the colour which bends:
- The most.
- The least while passing through a glass prism.
