When one enters a dark room after being in bright light one is not able to see anything clearly for a while because  A) the retina of the eye moves forward B) the retina of the eye moves backward C) the iris is unable to dilate the pupil immediately to be able to see things D) the eye has no power of accommodation

Q: Write TRUE if the statement is correct and FALSE if it is not.  a. Light needs a medium through…

A:

Q: The ciliary muscles in a horse’s eye can make only small changes to the shape of the lens, so a…

A: Concept: Similar to circle sphere is a two dimensional space where the set of points that are at the…

Q: Set up two pocket mirrors at right angles and place a coin between them. You'll see four coins.…

A: a) As the mirrors are moved close together, the number of images seen will increase.

Q: The diagram below shows a layer of oil that is floating on water in a glass container. A ray of…

A:

Q: You put a lens in front of phone screen and the light coming through the lens makes a large version…

A:

Q: The human eye can be approximated by a two-lens optical system. Light enters the eye and first…

A: The human eye is very similar to a microscope. Human eye consists of two lens, one is crystalline…

Q: Express your answer with the appropriate units. An LCD (liquid crystal display) projector works by…

A: Height=4cm Image distance=6cm

Q: List the parts of the human eye that control the amount of light entering into it. Explain how they…

A: The part of the human eye that control the amount of light entering is pupil. Light enters through a…

Q: farsightedness, the person will have trouble seeing images that are because the image is focused the…

A: A farsighted eye does not converge sufficient rays from a close object to make the rays meet on the…

Q: Persistence of vision is the principle behind:  A) Telescope B) Periscope C) Cinema D) Microscope

A: The image on an object forms on the retina rests on the retina for 1/16 th second. This is called…

Q: White light passes through a green filter and is observed on a screen. Describe how the screen will…

A: Color of screen

Q: What is the focusing power of the cornea/lens system when the eye is focused on an object that is…

A:

Q: The pupil of your eye is smaller in bright light than in dim light. Explain how this makes images…

A: The size of pupil

Q: A parallel beam of light is sent through an aquarium. If a convex glass lens is held in the water,…

A: a parallel beam of light when pass through the aquarium,

Q: Joe is 1.94 m high. What is the minimal size of a plane mirror where he can see a full view of…

A: Given data The height of the person named joe is 1.94 m. From the application portion of the topic…

Q: When you closely examine an object through a magnifyingglass, the magnifying glass(a) makes the…

A: Magnifying glass

Q: Which part of the human eye contains light sensitive cells that convert an image into electrical…

A: Retina contains light sensitive cells that convert image into electrical signals to send it to…

Q: A magnifying glass forms an image of a 4.00-mm-tall thumb tack that is to the left of the lens. The…

A:

Q: Most animals—humans included—have eyes that use lenses to form images. The eyes of scallops are…

A: The angle at which refraction takes place is determined by the refractive index of the material. We…

Q: Which laser wavelengths are hazards for the following? a. cornea of the eye b. retina of the eye

A: Laser Wavelength: The visible (VIS) light spectrum ranges from violet to red, with wavelengths…

Q: A refracting telescope uses

A: Step 1 A refracting telescope is a telescope that uses the technique of refraction only to see the…

Q: The walls of a room 8m x 10m are covered with plane mirrors. A man stands at the center of the room.…

A: Given: The walls of the room are 8m x 10 m.

Q: A fish in a flat-sided aquarium sees a can of fish food on the counter. To the fish’s eye, the can…

A:

Q: 36.) Which of the following describes the chief reason for color blindness? a. the cones in the…

A: On the retina, the image is formed when the light waves fall on the light-sensitive cells on the…

Q: Write the function of each of the following parts of human eye: Cornea, iris, crystalline lens,…

A: Cornea: It is a transparent bulge on the front surface of eyeball which refracts most of the light…

Q: A grating is a device that a. bends light and allows it to focus at a point. b.…

A: A diffraction grating is a special device or an instrument in which several number of parallel…

Q: A glass container is filled with an unidentified liquid. A gold coin is then placed in the container…

A:

Q: count/give the number of lenses used in a camera, magnifying glass and telescope then Identify…

A: Concave means "hollowed out or rounded inward" and is easily remembered because these surfaces…

Q: A person stands at the window of the building so that his eyes are 16m above the level of the…

A:

Q: Change in focal length of eye lens is caused by: A) ciliary muscles B) iris C) pupil D) retina

A: When ciliary muscles get contracted then lens has increased focal power or lesser focal length…

Q: The widest cinema screen in the world was reportedly constructed in New Zealand in 2007. The screen…

A: The given values are,

Q: Joe is 1.81 m high. What is the minimal size of a plane mirror where he can see a full view of…

A: Given data The height of Joe is hJoe=1.81 m Step 1 The minimum height of the mirror required is,

Q: Most animals—humans included—have eyes that use lenses to form images. The eyes of scallops are…

A: Given The diameter of the pupil of human eye is D = 3 mm. The f-number for a human eye is calculated…

Q: The eye focus by a. moving the lens b. moving the retina c. moving both the lens and retina d.…

A: The eye forms an image of an object by focusing the light coming from the object on its retina. This…

Q: Most animals—humans included—have eyes that use lenses to form images. The eyes of scallops are…

A: The reflection of light from the front and back faces of the guanine crystals are n = 1.83 and n =…

Nature of light

Light is transverse and electromagnetic radiation that exhibits the properties of a wave as well as a particle. For this reason, light is said to have a “dual nature.”