Optics Answers

A surface oriented perpendicularly is positioned 2 m away from a lightbulb emitting 100 W of radiant flux. (a) Calculate the irradiance Ee at the surface. b) If all 100 W is emitted from a red bulb at λ = 650 nm, calculate the illuminance Ev at the surface. Hint: use the following equation: photometric unit = K(λ)×radiometric unit. Where K(λ) is the luminous efficacy given by : K(λ) = 685V (λ) and V (λ) is the luminous efficiency obtained from a CIE luminous efficiency curve.

Find the angular magnification produced by a simple microscope of
focal length 5cm when used not in normal adjustment.

Determine the numerical apperature of a step index fibre when the core refractive index n1=1.5 and cladding refractive index n2=1.48 find the maximum angle for entrance of light if the fibre is placed in the air

For normal incidence of light from a medium of refractive index 1.42 onto medium of refractive index 1.64, calculate the reflection and transmission coefficients.

A ball bearingX is dropped vertically downwards from the edge of a table and it takes 0.5 seconds to hit the floor.another one y leaves the edge of the table horizontally with a velocity of 5mpr second find
A.time taken for y to reach the floor

In Newton's ring experiment, sodium light is used (A1=589 nm, 12=589.6nm). Radius of curvature of plano-convex lens R=100 nm.

Calculate the order number of the ring at which they fades away. Find out the distance from the point of contact from where the rings fades away.

1-A camera uses a 200.0-mm focal length telephoto lens to take pictures from a distance of infinity to as close as 2.0 m. What are the minimum and maximum distances from the lens to the sensor?

an airfilled parallelplate capacitor has plates of area 2.30cm^2 seperated by 1.50 mm. a)find the value of its capacitance . the capacitor is connected to a 120 v battery. b)what is the charge on the capacitor c)what is the magnitude of the uniform electric field between the plates?

A bar (L= 80 cm) moves on two frictional rails where the magnetic field is uniform (B = 0.30 T) and into the paper . If v = 50 cm/s and R = 60 mOmps, determine the magnitude and direction of the magnetic force on the moving bar.

We observe polarisation of light wave rather than sound wave explain it's physical implication