Question
Water drops shine on a lotus leaf due to:
The correct answer is
Total internal reflection
Water drops shine on a lotus leaf due to total internal reflection.
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Important Questions from Refraction and Reflection
Which of the following is NOT an example of refraction of light?
If the object distance and the image distance from a concave mirror is -20 cm, what is the focal length of the mirror?
A convex lens 'A' of focal length $10 \text{ cm}$ and another convex lens 'B' of focal length $20 \text{ cm}$ are kept along the same axis with a distance '$d$' between them. If a parallel beam of light falling on 'A' leaves 'B' as a parallel beam, then the distance '$d$' in $cm$ will be :
- A ray is incident at an angle of incidence $i$ on one surface of a small angle prism (with angle of prism $A$ and refractive index $\mu$). The ray emerges normally from the opposite surface, causing a total angle of deviation $\delta$ from its original path. Assuming all angles are small, the angle of incidence $i$ is nearly equal to:
- A light ray travels from transparent medium A to transparent medium B, separated by a plane boundary.
Medium A has a refractive index of $n_A = 1.6$. The speed of light in medium B is $v_B = 2.4 \times 10^8 \text{ m/s}$.
Given the speed of light in vacuum is $c = 3.0 \times 10^8 \text{ m/s}$, the critical angle for total internal reflection when light passes from medium A to medium B is:
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