Advertisements
Advertisements
Question
How are critical angles related to the refractive index of the medium?
Advertisements
Solution

APPEARS IN
RELATED QUESTIONS
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.
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.

Choose the correct option.
Consider the following phenomena/ applications: P) Mirage, Q) rainbow, R) Optical fibre and S) glittering of a diamond. Total internal reflection is involved in
Choose the correct option.
Angles of deviation for extreme colours are given for different prisms. Select the one having maximum dispersive power of its material.
Describe the construction and working of an optical fibre.
A green light is incident from the water to the air-water interface at the critical angle (C). Select the correct statement.
What are the conditions to achieve total internal reflection?
A green light is incident from the water to the air-water interface at the critical angle (θ). Select the correct statement.
A rectangular block of glass ABCD has a refractive index 1.6. A pin is placed midway on the face AB (Figure). When observed from the face AD, the pin shall ______.

- appear to be near A.
- appear to be near D.
- appear to be at the centre of AD.
- not be seen at all.
