Optics Answers

An under water swimmer is at a depth of 12 m below the surface of water. A bird is at a height of 18 m from the surface of water, directly above his eyes. For the swimmer the bird appears to be at a distance ______ from the surface of water. (Refractive Index of water = 4/3 )
Answer : 24cm

Ray of light incident at an angle 60° on a √3 cm thick plate the shift in the path of the ray as it emerges out from the plate is? ( Refractive index of plate is √3)

A person's eye is at a height of 1.5m.He stands infront of a 0.3m long plane mirror which is 0.8m above the ground.The length of the image he sees of himself is:

A ray of light passes from air though a rectangular glass block whose longest parallel sides are 4.5cm apart. Given that the angle of incidence is 52°, determine the lateral displacement of the ray. (Refractive index of glass= 1.5)

A microscope is focused on an insect. When the insect is covered by a plate of glass of 2 cm thick, the microscope has to be raised 0.67cm the insect to be focused. Calculate the refractive index of the glass.

A fixed incident ray strikes a plane mirror at an angle of incident of 15°. The mirror is then rotated through an angle of 20°. Determine the angle between the incident and reflected rays.

A ray of light travelling in air falls on the surface of a transparent material at an angle of 45°to normal. It bends by 15° after refraction. Find the refractive index of the material

a single lens reflex camera has a converging lens with a focal length of 50.0 mm. What is the position and size of the image of a 25 cm high candle located 1.0 m from the lens?

in COMPOUND MICROSCOPE the total magnification is obtained by MULTIPLYING the magnification of eyepiece and objective lense. WHY we don't ADD them up. why we multiply them?

Light traveling through Air encounters a second medium which slows the light to 2.7×10 to the power of eight minutes per second what is the index of the second medium