Ch 38 Practice
1- Specify if the statements below are true or false
a) Electromagnetic waves are transverse
b) Intensity is a concept relevant for both EM waves and for sound waves
c) If the electric field in an EM wave decreases in magnitude
Combination of lenses
1- Two converging lenses
Two converging lenses are 90cm apart. The 30cm focal length lens is to the left of the 15cm
focal length lens. A 15 cm tall arrow is placed 90cm to the left of the 30 cm focal length lens.
Where does the fina
Ch 39 - Practice Problems
1) How tall does a plane mirror need to be in order for you to see your entire
image reflected in it?
2) The critical angle of a certain piece of plastic in air is 37.3. Find its critical
angle if it is immersed in wa
Chapter 41- HW solution
E:6,24,25,26,29,30,31 P: 1,10
Note: For sunlight (or white light) through a double slit, each wavelength (each color)
will go to a specific angle, however the central maxima (when path difference is zero (or
m = 0 for t
Chapter 36- HW solution
For = +46 the charge on the capacitor is decreasing, for = 46 it is increasing.
To check this, we can calculate the derivative of q with respect to time, evaluated for
t = 0. We obtain dq/dt = Q sin
Physics Notes for Class 12 Chapter 13 Nuclei
The entire positive charge and nearly the entire mass of atom is concentrated in a very small
space called the nucleus of an atom.
The nucleus consists of protons and neutrons. They are called nu
Physics Notes for Class 12 Chapter 9 Ray
Optics and optical Instruments
Light is a form of energy eyes. which produces the Sources of light are of three typesthermal sources and luminescent sources.
Photometry is a branch measurement of light
Physics Notes for Class 12 Chapter 4 Moving
Charges and Magnetrism
A magnetic field is produced in the surrounding of any current carrying conductor.
The direction of this magnetic field can be obtained by Amperes swimming rule.
Physics Notes for Class 12 Chapter 10 Wave
Wave optics describes the connection between waves and rays of light. According to wave
theory of light, the light is a form of energy which travels through a medium in the form of
transverse wave m
Physics Notes Class 12 Chapter 11 Dual
Nature of Radiation and Matter
Cathode rays are the stream of fast moving electrons. These rays are produced in a discharge
tube at a pressure below 0.01 rom of mercury.
Properties of Cathode Rays
Physics Notes for Class 12 chapter 8 and
15 ELECTROMAGNETIC WAVES and
It is a current which produces in the region in which the electric field and hence the electric
flux changes with tim
Physics Notes Class 12 Chapter 14
Semiconductor Electronics, Materials, Devices
and Sample Circuits
It is the branch of science which deals with the electron flow through a vacuum, gas or
Classification of substances on the basis of
Physics Notes for Class 12 Chapter 5
Magnetrism And Matter
The property of any object by virtue of which it can attract a piece of iron or steel is
A natural magnet is an ore of iron (Fe3O4), which attracts small pi
Physics Notes for Class 12 chapter
CHAPTER 3 CURRENT ELECTRICITY
An electric current which vary for a small finite time, while growing from zero to maximum or
decaying from maximum to zero, is called a transient current.
1) In a Young's double slit set-up, coherent light of wavelength travels from the
left and strikes a mask containing two very small slits separated by distance d.
The light passing through the slits forms an interference