Full Answer
Why is the angle of incidence equal to the angle of reflection?
In the law of reflection, students do not often question why the angle of incidence is equal to the angle of reflection and why a light ray should follow this specific path. Here we encourage students to question this result and provide an exercise to facilitate instruction regarding specular reflection of light.
Is angle of incidence true experimentally?
Bookmark this question. Show activity on this post. Angle of incidence = Angle of reflection is true experimentally. I just started highschool. Don't mind if this is a low level question. But I was just curious. Show activity on this post. A proof requires axioms, basic statements that can't be proven.
Are the angles of incidence of a ray of incidence congruent?
Angle AMO and NMB' are vertical angles and vertical angles are congruent. The angle of incidence of ray is measured from the normal to the plane it intersects and congruent angles have congruent angles have congruent complements, so it follows that the angles of incidence are congruent.
What is the angle of incidence of light on a surface?
Let's assume that the beam of light hits the reflecting surface directly from above, so the angle of incidence is 0 degrees. Now you have many electrons that are being bombarded by even more photons, all emitting photons in many directions.
Who is credited with recognizing the piezoelectric effect?
By the time Pierre was 21 and Jacques 24, the brothers had discovered the piezoelectric effect (from the Greek word meaning “to press”). The Curie brothers had found that when pressure is applied to certain crystals, they generate electrical voltage.
Who discovered that the pitch of sound waves varies if the source of the sound was moving?
Christian Doppler, (born Nov. 29, 1803, Salzburg, Austria—died March 17, 1853, Venice), Austrian physicist who first described how the observed frequency of light and sound waves is affected by the relative motion of the source and the detector. This phenomenon became known as the Doppler effect.
Which of the following is considered the father of acoustics?
Image 1: Ernst Chladni (1756-1827), the 'father of acoustics'. Image from Wikimedia Commons. Ernst Chladni (1756-1827) is regarded by many historians as the 'father of acoustics' for his seminal experimental work on vibrations. He was also a well respected musician and inventor of musical instruments.
Which of the following techniques is helpful in determining whether a mass has the potential to be malignant or benign?
Imaging is used not only for local staging but also to differentiate between benign and malignant lesions. MRI is the preferred imaging modality for the evaluation of soft-tissue masses in clinical practice.
Who first discovered sound waves?
Italian physicist, Galileo, was the first scientist to record the relationship between the frequency of the wave to the pitch it produces. Since the sound waves produced by musical instruments vary in pitch, this was a very significant discovery.
Who first discovered the Doppler effect?
Christian Andreas DopplerChristian Andreas Doppler is renowned primarily for his revolutionary theory of the Doppler effect, which has deeply influenced many areas of modern science and technology, including medicine.
Who discovered acoustic resonance?
scientist Felix SavartIn the second quarter of the 19th century, the French scientist Felix Savart invented this apparatus to demonstrate resonance.
What did Ernst Chladni discover?
In 1791, Chladni invented the musical instrument called the euphon (not to be confused with the brass instrument euphonium), consisting of glass rods of different pitches. Chladni's euphon is the direct ancestor of the modern day musical instrument known as the Cristal Baschet.
Who discovered harmonic frequencies?
The principles of Harmonics were discovered by Pythagoras c. 587-c. 507 B.C. during travels to Egypt and throughout the ancient world. Pythagoras first began to teach at the age of 50.
Are all tumors cancerous?
If you have a tumor, it isn't necessarily cancer. Many tumors are benign (not cancerous). Tumors can form throughout the body. They can affect bone, skin, tissues, glands and organs.
Are malignant tumors cancerous?
Malignant tumors have cells that grow uncontrollably and spread locally and/or to distant sites. Malignant tumors are cancerous (ie, they invade other sites). They spread to distant sites via the bloodstream or the lymphatic system. This spread is called metastasis.
What is the difference between a neoplasm benign tumor and malignant tumor?
What are Benign and Malignant Tumors and Neoplasms? Both tumor and neoplasms can be benign or malignant, which means non-cancerous or cancerous. Benign tumors and neoplasms are not cancer, while malignant tumors and neoplasms are cancer. Benign tumors do not spread throughout the body and grow slowly.
Which direction does the surface exert a force on the photon?
1. As a variation on harshit54 's answer, if you look at it classically, the surface exerts a force on the photon in the direction perpendicular to the surface. Thus, only the perpendicular component of the velocity vector changes.
What happens when a photon hits an electron?
When a photon hits an electron, its energy gets absorbed and the electron goes into a higher energy state.
Do photons cancel each other out?
The photons that are emitted at an angle however, will be out of phase with eachother (since there is a distance between the electrons, if two photons are emitted at any angle at the same time, there will be a slight delay between them). Photons that are out of phase will tend to cancel eachother out. Photons that are in phase (all the photons that ...