In total destructive interference all the energy is reflected back ( minus some due to absorption and scattering in the matter of the optical system).

Yes law of conservation of energy is obeyed. In case of constructive interference, intensity becomes maximum and bright fringes are formed in the screen whereas in case of destructive interference, intensity being minimum, dark fringes are formed.

Destructive interference destroys the potential energy, but doubles the kinetic energy.

The condition for constructive interference is that the phase difference between the two waves should be an even integral multiple of π or 1800. For destructive interference, the phase difference between the two waves is an odd integral multiple of π or 1800 .

With a constructive wave, the swash is stronger than the backwash. With a destructive wave, the backwash is stronger than the swash. If the swash is weaker than the backwash (destructive wave), very little sediment is carried up the beach.

When two waves of identical wavelength are in phase, they form a new wave with an amplitude equal to the sum of their individual amplitudes (constructive interference).

When two waves meet in such a way that their crests line up together, then it’s called constructive interference. The resulting wave has a higher amplitude. In destructive interference, the crest of one wave meets the trough of another, and the result is a lower total amplitude.

The path difference for destructive interference is odd multiple of 2λ or (2n+1)2λ. For constructive interference it is integral multiple of λ or nλ Answer verified by Toppr. Upvote (0) Was this answer helpful?

Destructive interference occurs when the maxima of two waves are 180 degrees out of phase: a positive displacement of one wave is cancelled exactly by a negative displacement of the other wave. The amplitude of the resulting wave is zero.

First, a change in wavelength (or frequency) of the source will alter the number of lines in the pattern and alter the proximity or closeness of the lines. An increase in frequency will result in more lines per centimeter and a smaller distance between each consecutive line.

Answer: The difference between interference and diffraction of light is important to understand in Physics. The basic difference occurs is that diffraction occurs when waves encounter an obstacle while interference occurs when two waves meet each other.

There are two different types of interference: proactive interference and retroactive interference.

There are two main classes of diffraction, which are known as Fraunhofer diffraction and Fresnel diffraction.

Huygens’ principle states that every point on a wave front may be considered as a source of secondary waves. The word interference is used to describe the superposition of two waves, whereas diffraction is interference produced by several waves.

The new wavefront is tangent to the wavelets. This principle works for all wave types, not just light waves. The principle is helpful in describing reflection, refraction and interference. shows visually how Huygens’s Principle can be used to explain reflection, and shows how it can be applied to refraction.

If we pass light through smaller openings, often called slits, we can use Huygens’s principle to see that light bends as sound does (see Figure 6). The bending of a wave around the edges of an opening or an obstacle is called diffraction. Diffraction is a wave characteristic and occurs for all types of waves.

Huygen’s principle states that every point on the wavefront may be considered a source of secondary spherical wavelets which spread out in the forward direction at the speed of light. The new wavefront is the tangential surface to all these secondary wavelets. Thus, it is a geometrical method to find the wavelength.

Huygens–Fresnel principle

• Wave refraction in the manner of Huygens.
• Wave diffraction in the manner of Huygens and Fresnel.
• Diffraction of a plane wave when the slit width equals the wavelength.
• Geometric arrangement for Fresnel’s calculation.

Types of personal hygiene

• Toilet hygiene. Wash your hands after you use the restroom.
• Shower hygiene. Personal preference may dictate how often you wish to shower, but most people will benefit from a rinse at least every other day.
• Nail hygiene.
• Teeth hygiene.
• Sickness hygiene.
• Hands hygiene.

Good personal hygiene is one of the best ways to protect yourself from getting illnesses such as gastroenteritis and the common cold. Washing your hands with soap removes germs that can make you ill. Maintaining good personal hygiene will also help prevent you from spreading diseases to other people.

7 Personal hygiene

• washing the body often.
• If this happens, a swim or a wash all over the body with a wet sponge or cloth will do.
• cleaning the teeth at least once a day.
• washing the hair with soap or shampoo at least once a week.
• washing hands with soap after going to the toilet.

Good hygiene lowers your risk for diseases and illnesses commonly spread through viruses and bacteria. Washing yourself and staying clean can kill and remove illness-causing bacteria from your body, lowering the risk for disease. Good hygiene is key to preventing infection when wounds and skin irritation are present.

It gives you self-confidence Every woman needs her self-confidence to step out into the world and be her best each day. Grooming plays a major role in maintaining a high self-esteem and self-confidence. It does this by influencing your appearance, which in turn affects the way you regard yourself.

Personal grooming and corporate dressing actually go hand in hand. Donning an expensive business suit will not help, if you are not neat and clean. Personal grooming is essential for everyone irrespective of the gender and nature of profession. Personal hygiene, if neglected can ruin your personality.

Differences of Grooming Process of making ourself look attractive, neat and appear beautiful on the exterior part of body to the outer world. Etiquette is simply courtesy to others. Etiquette is simply courtesy to others.

Grooming, carrying yourself well and your overall attitude gives you a boost of confidence. That’s an essential step in the path of your career. As you feel better about yourself, your low self esteem disappears and you tend to take up opportunities for personal growth in your career.