ELECTRICITY CHAPTER # 16 Physics 10th - Question Answers

 Physics 10th - Question Answers

ELECTRICITY
CHAPTER # 16

Q.1: What do you know about the electrical nature of matter?

Ans:
Matter is made up of atoms and an atom consists of three elementary particles called neutron, proton, and electron.

• Proton is positively charged and present in the nucleus. It is 1836 times heavier than an electron.
• Neutron has no charge. It is also present in the nucleus. Its mass is equal to the mass of a proton.
• Electron is a negatively charged particle. Its charge is equal to the charge of a proton. Electrons move around the nucleus in orbits.

NATURE OF LIGHT AND ELECTROMAGNETIC SPECTRUM CHAPTER # 15 Physics 10th - Question Answers

 Physics 10th - Question Answers

NATURE OF LIGHT AND ELECTROMAGNETIC SPECTRUM
CHAPTER # 15

Q.1: What is Newton’s corpuscular theory of light?

Ans:
This theory which was proposed by Newton is given briefly as under:

• Light consists of tiny (minute) particles called corpuscles.
• These corpuscles are emitted from a source of light (like the sun).
• These corpuscles are traveled in a straight line.
• When these particles enter the eyes, they create the sensation of sight.
• Velocity of light in a denser medium is greater.

Refraction of Light and Optical Instruments (Chapter # 14) Physics 10th Question Answers

Refraction of Light and Optical Instruments

Q.1: Define refraction of light and laws of refraction?

Answer:

Refraction: When a ray of light enters from one medium into another obliquely, it undergoes a change not only in direction but in velocity as well. This change of direction and velocity of light as it enters from one medium into another is known as refraction of light.

PROPAGATION AND REFLECTION OF LIGHT (Chapter # 13) Physics 10th - Question Answers

Physics 10th - Question Answers

PROPAGATION AND REFLECTION OF LIGHT

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Q.1: What do you understand by rectilinear propagation of light or path of light?

Ans:

• A ray of light travels in a straight path or straight line. This phenomenon is known as rectilinear propagation of light.