1.) A concave mirror forms a real image at 17.0 cm from the mirror surface along

Question

1.) A concave mirror forms a real image at 17.0 cm from the mirror surface along the principal axis. if the corresponding object is at a distance of 36.0 cm, what is the mirrors focal length?

2.) The critical angle of refraction or calcite is 68.4 degrees when it forms a boundary with water. use this information to determine the speed of light in calcite.

3.) Monochromatic light from a helium-neon laser (

   (lambda = 632.8nm) ) shines at a right angle onto the surface of a diffraction grating that contains 130 960 lines/m. Find the angle at which one would observe the first-order maximum.

4.) A certain radio wave has a frequency of 2.0 * 10^6 Hz. What is its wavelength?

7.)what is the value of the unknown resistor in the circuit shown below if the equivalent resistance for the circuit is 21.20 omega?

8.)Two equal charges are separated by 3.7 * 10^-10 m. The force between the charges has a magnitude of 2.37 * 10^-3 N. What is the magnitude of q on the charges?

9.) What is the resistance of a resistor if the potential difference across the resistor is 4.0 V when a current of 10.0 A flows through the resistor?

10.) An electron moves north at a velocity of 9.8 * !0^4 m/s and has a magnetic force of 5.6 * 10^-18 N west exerted on it. If the magnetic field points upward, what is the magnitude of the magnetic field?

11.) A step-down transformer has 16000 turns on the primary and 95 turns on the secondary. If the rms emf across the secondary coil iis 120 V, what is the maximum emf across the primary coil?

12.) A concave mirror forms a real image at 17.0 cm from the mirror surface along the principal axis. If the corresponding object is at a distance of 36.0 cm, what is the mirrors focal length?

13.) The figure below shows the energy levels for a hydrogen atom. What is the energy of the photon emitted when the electron in a hydrogen atom drops from energy level E5 to evergy level E2?

Explanation / Answer

1)Just use mirror equation

Let u1 u2 u3 be refractive indices of air , water and calcite

We know u1 = 1 and u2 = 4/3 and u3 = 1/sin 68.4

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