The bending nature of light around the corners of obstacles is called
Diffraction
Bending Light Around Obstacles Explained
The question asks to identify the phenomenon where light bends as it passes around the corners or edges of obstacles. This behavior is a fundamental aspect of how light, behaving as a wave, interacts with its surroundings.
Refraction Explained
Refraction is the bending of light as it passes from one transparent medium into another. This occurs because the speed of light changes when it enters a different medium. For example, light bends when it moves from air into water or glass. The amount of bending depends on the refractive indices of the two media and the angle of incidence. The relationship is described by Snell's Law: \(n_1 \sin \theta_1 = n_2 \sin \theta_2\), where \(n_1\) and \(n_2\) are the refractive indices and \(\theta_1\) and \(\theta_2\) are the angles of incidence and refraction, respectively.
Reflection Explained
Reflection is the phenomenon where light bounces off a surface. When light strikes a boundary between two different media, some or all of it is reflected back into the original medium. The law of reflection states that the angle of incidence (\(\theta_i\)) is equal to the angle of reflection (\(\theta_r\)), measured with respect to the normal to the surface: \(\theta_i = \theta_r\). Reflection is responsible for the formation of images in mirrors.
Diffraction Explained
Diffraction is the phenomenon characterized by the bending and spreading out of light waves as they encounter an obstacle or pass through a narrow opening (aperture). When light waves encounter the edge of an obstacle, they don't just travel in straight lines; instead, they spread into the region that would otherwise be in the geometric shadow. This effect is most noticeable when the size of the obstacle or opening is comparable to the wavelength of the light. Diffraction demonstrates the wave nature of light and is responsible for effects like the spreading of light from a point source after passing through a small hole or the pattern seen when light passes through a fine grating.
Based on the definition, the bending of light around the corners of obstacles is precisely what diffraction describes.
Conclusion
Comparing the definitions, the specific phenomenon of light bending around the edges of obstacles matches the definition of diffraction.
Important Questions from Diffraction
In the dispersion of white light by a common glass prism, which one among the following is correct?
In a double-slit experiment, when light of wavelength $\text{600 nm}$ is used, the central maximum and the second bright fringe are separated by $\text{3 mm}$ on a screen placed $\text{1.5 m}$ away. If the entire apparatus is then immersed in a liquid with a refractive index of $\text{1.5}$, what will be the angular separation between the first and fourth dark fringes?
Which one of the following statements about X-rays is not true?
When light passes from air to water, the angle of refraction is:
The primary rainbow appears after the rain is due to
