Two plane mirrors L1​ and L2​ are parallel to each other and 3... | Filo (2025)

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A converging lens has a focal length of 30cm. Rays from a 2.0cm high filament that pass through the lens form a virtual image at a distance of 50cm from the lens. Where is the filament located? What is the height of the image?

The prism shown in figure has a refractive index of 1.60 and the angles A are 30∘. Two light rays P and Q are parallel as they enter the prism. What is the angle between them after they emerge? [sin−1(0.8)=53∘]

A source of light is located at double focal length from a convergent lens. The focal length of the lens is f=30cm. At what distance from the lens should a flat mirror be placed, so that the rays reflected from the mirror are parallel after passing through the lens for the second time?

n the figure shown, at what distance(a) E2​ will appear to E1​(b) E1​ will appear to E2​

Assume that a certain spherical mirror has a focal length of −10.0cm. Locate and describe the image for object distances of (a) 25.0cm

For a Bose gas in a three dimensional cubic box of volume V, the density of states for the gas isD = V * (Am)^(3/2) / (2 * 42h^2)(a) Show that the density of the gas can be written as a sum of the density in the ground state (no) and excited states (ne), where the total density is given byn = no + ne = 1 / (9/2)(b) Derive an expression for the Bose Einstein condensation critical temperature, i.e. the temperature at which a significant fraction of the bosons are in the ground state.(c) Given that in one and two dimensions, the density of states of the Bose gas is proportional to 1/2 and 1, respectively, comment on the prospect of observing Bose Einstein condensation in one and two dimensional systems.

Figure 30.16 was constructed using the Pauli exclusion principle and indicates that the n 1 shell holds 2 electrons, the n 2 shell holds 8 electrons, and the n 3 shell holds 18 electrons. These numbers canbe obtained by adding the numbers given in the figure for the subshells contained within a given shell. How many electrons can be put into the n 5 shell, which is only partly shown in the figure?

In the figure, the ideal batteries have emfs of 18.2V, 9.38V, and 4.50V, and the resistances are each 2.50Ω. What are the (a) size and (b) direction (left or right) of current i? (c) Does battery 1 supply or absorb energy, and (d) what is its power? (e) Does battery 2 supply or absorb energy, and (f) what is its power? (g) Does battery 3 supply or absorb energy, and (h) what is its power?1(a) NumberUnits(b) left(c) (d) NumberUnits(e) (f) NumberUnits(g) (h) NumberUnits

A parallel plate capacitor is connected with a resistance R and a cell of emf varepsilon as shown in figure. The capacitor is fully charged. Keeping the right plate fixed, the left plate is moved slowly towards further left with a variable velocity v such that the current flowing through the circuit is constant. Then the variation of magnitude of v with separation x between the plates is represented by curve

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