Why do photographs in a book or magazine look grainy when magnified?

Q: What happens as the frequency of light used to produce photoelectric effect increase? *

A: Photoelectric effect is defined as a phenomena in which the electrons gets emitted from the surface…

Q: A LED household bulb is marked with a colour temperature of 3499 K, calculate the peak wavelength…

A: Given data: Color temperature of LED bulb is, T=3499 K.

Q: At 101°K the black body radiation weighs per cubic centimetre... 10A-6 gram O 10^-16 gram

A: Given Temperature (T)=1010  K

Q: When ignited, a uranium compound burns with a green flame. The wavelength of the light given off by…

A:

Q: Why is a vacuum needed in both the X-ray and cathode ray tube?

A: In x-ray tube electrons are produced in the cathode by thermionic emission. These electrons are…

Q: Why can atoms be seen with an electron beam?

A: The atoms can be seen with an electron beam because their size is larger than the wavelength of an…

Q: The percent of projectile electron energy that is converted to x-ray energy is about O (80) O (1) O…

A: The projectile electron interacts with the electrons in the orbit of the target atom. Due to this,…

Q: Why are microwave ovens constructed so that they will not operate when the door is open?

A: Microwave oven works on the principle that polar molecule like water vibrates and produces heat when…

Q: The condition under which a microwave oven heats up a food item containing water molecules most…

A: In the presence of microwave, the  water molecules will oscillates and large heat is developed.

Q: contains the same number of protons, but a variable 2. number of neutrons. 3. The distance between…

A: Isotopes contains the same number of protons, but variable number of neutrons The distance between…

Q: Is it necessary that that every black coloured objects should be considered a blackbody?

A: A perfect black body is a body that absorbs all the radiation that falls on it.

Q: What is the function of a photodiode?

A: A photodiode is a PN-junction diode which utilizes the light rays to convert light energy into the…

Q: 3. X-rays of wavelength 8 pm are scattered from a target. Find the wavelength of the x-rays…

A:

Q: In digital radiography what replaces the intraoral film?

A: Digital radiography: The radiography in which X-ray sensitive plates are used to capture the data…

Q: is very effective in- .2 heating cancerous tumors, because tumors typically have high-water content…

A: Please see the answer below

Q: The energy of ionizing radiation is-3 * .usually given in amper True False

A: Given statement : The energy of ionizing radiation is usually given in amper

Q: How scanning tunneling electron microscope works?

A: Scanning Tunneling Microscope (STM) is a special type of electron microscope that is used for the…

Q: When was x-ray invented?

A: To determine When X ray was Invented

Q: If we continue heating a piece of initially room-temperature metal in a dark room, it will begin to…

A: The metal glows at any temperatures, but it can be clearly visible to human eyes when it reaches in…

Q: Why at night, under the mercury or sodium vapor lights in a mall parking lot, do cars seem to be…

A: Color rendering index (CRI):It is defined as the measurement of the ability of light source to…

Q: Discuss in brief the path of light through a droplet.

A:

Q: 1. X-rays of wavelength 8 pm are scattered from a target. Find the wavelength of the x-rays…

A: SOlution: given that wavelength = 8 pm angle = 60 degree

Q: Very big particles, like droplets of water, absorb more radiation than they scatter. How does this…

A: Scattering means the change in the  direction of particles due to collisions of two or more…

Q: of photons of wavelength 5 second by an electric bulb of power h =6 x1034 J-s) -34 %3D (a) 100 (b)…

A: Givenλ=540 nm=540×10-9 mPower of electric bulb, P=100 W or J/sh=6×10-34 J/s

Q: 3. X-rays of wavelength 8 pm are scattered from a target. Find the wavelength of the x-rays…

A: SOlution: given that wavelenght = 8 pm angle of scatter = 60 degree

Q: A very bright source of red light has much more energy than a dim source of blue light, but the red…

A: Red light and blue light

Q: How does a microwave oven heat up food even though it emits no thermal radiation?

A: To heat up food, a microwave oven emits thermal radiation, thermal radiation as in the form of…

Q: Say whether you think it is possible to measure the wavelength of a golf ball in flight. You should…

A: Given data, Mass of the ball = 250 gm Speed of the ball = 120 km/h Diameter of the ball = 4 cm

Q: Discuss (in your own words) why the Saturation Current is directly proportional to the Intensity of…

A: Solution: Photoelectric effect directly not propotional to the Intensity of incident radiation, but…

Q: Does an atom have a color?

A: Atoms unlike molecules do not have colors. We can’t see color of atoms not because they are too…

Q: Why can atoms not be seen with a powerful optical microscope?

A: Atoms cant been seen with an optical microscope because the size of the atoms is smaller than the…

Q: High-power lasers are used to compress a plasma (a gas of charged particles) by radiation pressure.…

A: The expression for the pressure is,

Q: What do you mean by x-ray crystallography?

A: X-ray crystallography is an experimental science used to determine the molecular and atomic…

Q: At 101°K the black body radiation weighs per cubic centimetre...... 10^-16 gram O 10^-6 gram O 1 ton…

A: Energy density can be given by Stefan Boltzmann law u=σT4cwhere u is energy density σ is Stefan…

Q: Since every object has some temperature, every object radiates energy. Why, then, can’t we see…

A: Every object radiates energy

Wien's displacement law

Students often get confused between Wien's displacement law and Planck's radiation law. Although both are historically related, yet they are conceptually different. Planck's law helps determine the spectrum of a blackbody, while Wien's law determines the relationship between peak wavelength and temperature.