Question 1

A hypermetropic eye cannot focus on objects that are more than 2.50 m away from it. The power of the lens used to correct this vision defect is

Accepted Answer

The answer of A hypermetropic eye cannot focus on objects...

Question 2

By changing the separation distance between lens and film, a camera can focus on subjects at a variety of distances. Assume that the lens-film separation for taking an in-focus picture of a distant object is d₀. To take an in-focus picture of a nearby object, the lens-film separation is

Accepted Answer

The answer of By changing the separation distance between lens...

Question 3

Ordinarily, light microscopes using magnifications greater than about 2000 are not built because the light received would be too

Accepted Answer

At magnifications greater than about 2000, the limitation is not the brightness or the amount of refraction, but the diffraction of light. Diffraction limits the resolution of the microscope, making it difficult to distinguish between two close objects because their diffracted light patterns overlap.

Question 4

A person uses two microscopes to view the same object. Microscope A is twice as long as microscope B, and its lenses have focal lengths half as large as those in microscope B. The magnification provided by microscope B is

Accepted Answer

The answer of A person uses two microscopes to view...

Question 5

To construct an astronomical telescope, the separation between the two converging lenses of focal lengths 100 cm and 10 cm should be

Accepted Answer

The separation between the two lenses in an astronomical telescope, when adjusted for parallel rays (i.e., focused at infinity), is equal to the sum of their focal lengths. Therefore, the separation is 100 cm + 10 cm = 110 cm.

Quiz 34: Reflection, Refraction, and Optics

A hypermetropic eye cannot focus on objects that are more than 2.50 m away from it. The power of the lens used to correct this vision defect is

By changing the separation distance between lens and film, a camera can focus on subjects at a variety of distances. Assume that the lens-film separation for taking an in-focus picture of a distant object is d0. To take an in-focus picture of a nearby object, the lens-film separation is

Ordinarily, light microscopes using magnifications greater than about 2000 are not built because the light received would be too

A person uses two microscopes to view the same object. Microscope A is twice as long as microscope B, and its lenses have focal lengths half as large as those in microscope B. The magnification provided by microscope B is

To construct an astronomical telescope, the separation between the two converging lenses of focal lengths 100 cm and 10 cm should be

By changing the separation distance between lens and film, a camera can focus on subjects at a variety of distances. Assume that the lens-film separation for taking an in-focus picture of a distant object is d₀. To take an in-focus picture of a nearby object, the lens-film separation is