Advertisements
Advertisements
प्रश्न
A green light is incident from the water to the air-water interface at the critical angle (C). Select the correct statement.
पर्याय
The entire spectrum of visible light will come out of the water at an angle of 90° to the normal.
The spectrum of visible light whose frequency is less than that of green light will come out to the air medium.
The spectrum of visible light whose frequency is more than that of green light will come out to the air medium.
The entire spectrum of visible light will come out of the water at various angles to the normal.
Advertisements
उत्तर
The spectrum of visible light whose frequency is less than that of green light will come out to the air medium.
Explanation:
`sin i_C = 1/n` and `n prop 1/lambda`
For greater wavelength (i.e., lesser frequency) n is less. Hence, iC would be more. Thus, these wavelengths will not suffer internal reflection and come out at angles less than 90°.
APPEARS IN
संबंधित प्रश्न
State the conditions required for total internal reflection of light to take place
A ray of light travels from water to air as shown in the diagram given below :
1) Copy the diagram and complete the path of the way. Given the critical angle for water is 48°.
2) State the condition so that internal reflection occurs in the above diagram.
Which colour of light has a higher critical angle? Red light or green light.
What do you understand by the deviation produced by a prism? Why is it caused?
One day Chetan’s mother developed a severe stomach ache all of a sudden. She was rushed to the doctor who suggested for an immediate endoscopy test and gave an estimate of expenditure for the same. Chetan immediately contacted his class teacher and shared the information with her. The class teacher arranged for the money and rushed to the hospital. On realizing that Chetan belonged to a below average income group family, even the doctor offered concession for the test fee. The test was conducted successfully.
Answer the following questions based on the above information:
(a) Which principle in optics is made use of in endoscopy?
(b) Briefly explain the values reflected in the action taken by the teacher.
(c) In what way do you appreciate the response of the doctor on the given situation?
i) Observe the given figure and answer the following questions.
a) Identify and write the natural process shown in the figure.
b) List the phenomena which are observe in this process.
c) Redraw the diagram and show above phenomena in it.
Total internal reflection can take place only if ______.
How does a ray of light bend when it travels from denser to rarer medium.
The twinkling effect of star light is due to ______.
