Exam 35: The Nature of Light and the Principles of Ray Optics

Two mirrors are at right angles to one another.If an object is placed near the mirrors,what is the largest number of images that would be seen in the mirrors?

A light ray strikes a hexagonal ice crystal floating in the air perpendicular to one face,as shown below.The hexagonal faces of the crystal are perpendicular to the plane of the page.All the rays shown are in the plane of the page,and n_ice = 1.30.Which outgoing ray is correct when the incoming ray strikes the crystal face on the left head on?

The laws of refraction and reflection are the same for sound as for light.The speed of sound in air is 340 m/s and in water it is 1510 m/s.If a sound wave approaches a plane water surface at an angle of incidence of 12.0°,what is the angle of refraction?

An aquarium contains a 5-cm layer of water (n = 1.33)floating on top of carbon tetrachloride (n = 1.461).If the angle of incidence into the water from the air is 30°,what is the angle of refraction into the carbon tetrachloride?

An aquarium contains a 5-cm layer of water (n = 1.333)floating on top of carbon tetrachloride (n = 1.461).If the angle of incidence into the water from the carbon tetrachloride is 20°,what is the angle of refraction into the air?

Light behaves like

A layer of kerosene (n = 1.45)is floating on water (n = 1.33).For what angles of incidence at the kerosene-water interface will light be totally internally reflected within the kerosene?

A person in a boat sees a fish in the water (n = 1.33),the light rays making an angle of 40° relative to the water's surface.What is the true angle (in degrees)relative to the water's surface of the same rays when beneath the surface?

Light is refracted through a diamond.If the angle of incidence is 30°,and the angle of refraction is 12°,what is the index of refraction?

A diver shines light up to the surface of a flat glass-bottomed boat at an angle of 30° relative to the normal.If the index of refraction of water and glass are 1.33 and 1.5,respectively,at what angle (in degrees)does the light leave the glass (relative to its normal)?

Two mirrors are at right angles to one another.A light ray is incident on the first at an angle of 30° with respect to the normal to the surface.What is the angle of reflection from the second surface?

A person looks horizontally at the edge of a swimming pool.If its length is 5 m,and the pool is filled to the surface,to what depth (in m)could the observer see? (n for water is 1.33)

Light strikes a diamond (n = 2.42)immersed in glycerin (n = 1.473)at an angle of 60° relative to the normal to the surface.What is the angle of refraction?

When light scatters from a rough surface,the law

According to Einstein's theory,the energy of a photon is

A diver shines an underwater searchlight at the surface of a pond (n = 1.33).At what angle (relative to the surface)will the light be totally reflected?

The wave front shown at the left for light in air reaches the plane boundary between air and two transparent mediums with n₁ = 1.5 and n₂ = 3.00 respectively. Which diagram below correctly illustrates the wave front after it has entered the two mediums at the right?

A light ray strikes a hexagonal ice crystal floating in the air at a 30° angle to one face,as shown below.The hexagonal faces of the crystal are perpendicular to the plane of the page.All the rays shown are in the plane of the page,and n_ice = 1.30.Which outgoing ray is the correct one?

The wave front shown at the left for light in air reaches the plane surface (shown by a slanted line)that bounds a medium with n = 1.50. Which diagram below correctly shows the wave front while entering the medium at the right?

A layer of ethyl alcohol (n = 1.361)is on top of water (n = 1.333).To the nearest degree,at what angle relative to the normal to the interface of the two liquids is light totally reflected?