Question
Explain ray of light and beam of light.

Answer

→A light wave can be considered to travel from one point to another, along a straight line joining them. This path is called a ray of light. A bundle of such rays constitutes a beam of light.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

A book is lifted from the floor and is kept in an almirah. One person says that the potential energy of the book is increased by 20J and the other says it is increased by 30J. Is one of them necessarily wrong?
Derive the equation of intensity of resultant wave generated due to super postion (or interference) of waves generated from two coherent sources.
An electric dipole of length 4 cm, when placed with its axis making an angle of 60o with a uniform electric field, experiences a torque of $4\sqrt{3}$Nm. Calculate the potential energy of the dipole, if it has charge $\pm$8 nC.
A closely wound solenoid of 800 turns and area of cross section 2.5 × 10–4 m2 carries a current of 3.0 A. Explain the sense in which the solenoid acts like a bar magnet. What is its associated magnetic moment?
Using Ampere’s circuital law, obtain an expression for the magnetic field along the axis of a current carrying solenoid of length l and having N number of turns.
Two point charges 4Q, Q are separated by 1 m in air. At what point on the line joining the charges is the electric field intensity zero?
Also calculate the electrostatic potential energy of the system of charges, taking the value of charge, Q = 2 × 10–7 C.
A cylindrical metallic wire is stretched to increase its length by 5%. Calculate the percentage change in its resistance.
A parallel beam of monochromatic light falls normally on a single narrow slit. How does the angular width of the principal maximum in the resulting diffraction pattern depend on the width of the slit?
Explain Inductance. Give its unit and dimensions.