Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions)

The sun gives light at the rate of 1400 Wm^-2 of area perpendicular to the direction of light. Assume lemda (sunlight ) = 6000 A. Calculate (a) the number of photons per second The sun gives light at the rate of 1400 Wm^-2 of area perpendicular to the direction of light. Assume lemda (sunlight ) [...]

A plate of mass 10 g is in equilibrium in air due to the force exerted by a light beam on the plate. Calculate power of the beam. Assume that the plate is perfectly absorbing. A plate of mass 10 g is in equilibrium in air due to the force exerted by a light beam [...]

The sun delivers about 1.4 kW/m^2 of electromagnetic flux to the earth’s surface. Calculate: (a) the total power incident on a roof of dimensions 8 m * 20 m. The sun delivers about 1.4 kW/m^2 of electromagnetic flux to the earth's surface. Calculate: (a) the total power incident on a roof of dimensions 8 m [...]

Photons of wavelength lemda = 662 nm are incident normally on a perfectly reflecting screen. Calculate their number per second falling on the screen such that the exerted force is Photons of wavelength lemda = 662 nm are incident normally on a perfectly reflecting screen. Calculate their number per second falling on the screen such [...]

A sensor is exposed for 0.1 s to a 200 W lamp 10 m away. The sensor has an opening that is 20 mm in diameter. How many photons enter the sensor if the wavelength of light is 600 nm? A sensor is exposed for 0.1 s to a 200 W lamp 10 m away. [...]

A plate is kept in front of a beam of photons. The plate reflects 40% of the incident photons and absorbs the remainder. If the plate absorb energy at a rate 1200 J/s, find the net force A plate is kept in front of a beam of photons. The plate reflects 40% of the incident [...]

An electron and a photon each has a wavelength of 1.0 nm. Find (a) their momenta, (b) the energy of the photon, and (c) the kinetic energy of electron. (b) the energy of the photon An electron and a photon each has a wavelength of 1.0 nm. Find (a) their momenta and (c) the kinetic [...]

Monochromatic light of wavelength 632.8 nm is produced by a helium-neon laser. The power emitted is 9.42 mW. Monochromatic light of wavelength 632.8 nm is produced by a helium-neon laser. The power emitted is 9.42 mW. October 12, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) ,

The intensity of direct sunlight before it passes through the earth’s atmosphere is 1.4 kWm^-2. If it is completely absorbed, find the corresponding radiation pressure. find the corresponding radiation pressure. The intensity of direct sunlight before it passes through the earth's atmosphere is 1.4 kWm^-2. If it is completely absorbed October 12, 2020 Category: Uncategorised [...]

Unpolarized light of intensity I passes through an ideal polarizer A. Another identical polarizer B is placed behind A. The intensity of light beyond B is found to be 1/2. Now another identical Unpolarized light of intensity I passes through an ideal polarizer A. Another identical polarizer B is placed behind A. The intensity of [...]