Question 1: Some TEMS are equipped with a flexible objective lens in which the polepieces can be exchanged. A TEM operating at 300 kV has two polepieces with spherical aberration coefficients of 0.45 and 0.20 mm. a) What is the optimum collection angle and resolution of the microscope in these two polepieces? (4) b) The chromatic aberration coefficient is often similar in value to the spherical aberration coefficient. At the optimum collection angles, compare the blurring due to chromatic and spherical aberration. Assume the energy spread of the electron source is 2 eV. (4)

Q: 1. Suppose an object with a feature size of a = 50 µm is imaged with magnification 1 by an ideal…

A: We have given that, the feature size of object is a = 50 μm = 50×10-6 m. The focal length of lens is…

Q: (a) What power contact lens is needed to correct the vision of a person who has a near point of 65.0…

A: SOlution: Given that v =65 cm u = 25 cm

Q: To fit a contact lens to a patient's eye, a keratometer can be used to measure the curvature of the…

A: The image distance: p=29.0 cm=0.29 m The magnification of the lens: M=0.0140

Q: A severely myopic patient has a far point of 5.11 cm. By how many diopters should the power of his…

A:

Q: An astronomer is studying a particular nebula in interstellar space using a reflecting telescope.…

A: Given That:For the larger telescope:Objective aperture diameter (D1)=290 mmFocal length of the…

Q: To fit a contact lens to a patient's eye, keratometer can be used to measure the curvature of the…

A: Solution:-

Q: To fit a contact lens to a patient's eye, a keratometer can be used to measure the curvature of the…

A: The radius of curvature of cornea is measured in a method. In this method, the image formed by the…

Q: The otoscope is one of the simplest and most frequently used medical instruments by general…

A:

Q: A plane glass disk with a small thickness do is used to re-image the laser spot O into the center O'…

A: INTRODUCTION:- Glass disk of thickness=do Refractive index : nh≈no-h22dof'whereno-refractive index…

Q: You want to use a film camera in an aerial photographic survey of your city. The camera has a focal…

A: Focal length F = 152mm Camera altitude H = 1520mm

Q: For a lens imaging an object: (a) what is the depth-of-focus (DOF) using the lens fi# for an object…

A: The depth of focus is the range of distances in which the picture behind a camera lens or other…

Q: (a) Calculate the limiting angle of resolution for the eye, assuming a pupil diameter of 2.05 mm, a…

A: Given that                  The diameter of the pupil is (D) = 2.05mm = 2.05×10-3m…

Q: The cornea of the eye has a radius of curvature of approximately 0.50 cm , and the aqueous humor…

A: Part (a)Given:The radius of curvature of eye is .The refractive index of humor is .The depth of…

Q: b. p = x, p° = 3.141E p=n, d. p= v2, p* = 1.414 f. p = 10", p* = 1400 h. p= 9!, p* V187

A:

Q: Microtubules are structures in cells that maintain cell shape and facilitate the movement of…

A: Given: The diameter of the tube is 25 nm. The wavelength of emitted light id 500 nm. The NA of the…

Q: And a telescope if you increase the focal length of a objective by a factor of nine by what factor…

A: We have given that focal length of the objective lens is increased by the factor of 9.  We need to…

Q: Suppose a certain person's visual acuity is such that he or she can see objects clearly that form an…

A: The maximum distance is 296.25km.

Q: (a) what power contact lens is needed to correct the vision of a person who has a near point of 72.0…

A: Given, Di=72cm Do=25cm

Q: A typical person's eye is 2.5 cm in diameter and has a near point (the closest an object can be and…

A:

Q: A certain child's near point is 13.0 cm; her far point (with eyes relaxed) is 115 cm. Each eye lens…

A:

Q: Masha is using a microscope to study Bascillus subtilis, which is a rod-shaped bacterium found in…

A:

Q: Estimate the linear separation (in kilometers) of two objects at a distance of 1.9 x 10° km that can…

A:

Q: ray of light falls on a film of water (nwater = 1.33) of thickness d and then refracted on a glass…

A: Given: The refractive index of the glass is nglass=1.66. The refractive index of the water is…

Q: n a LASIK vision correction, the power of a patient's eye is increased by 2.72 D. Assuming this…

A: Given  Increase in power =2.72 D Power Pnew =54 D Lens to retina distance v=0.02 m

Q: Problem 5: A student is getting her picture taken by a digital camera. The student is ho = 1.65 m…

A:

Q: A stargazer has an astronomical telescope with an objectivewhose focal length is 180 cm and an…

A: The focal length of the telescope,   The focal length of the objective lens,   The focal length of…

Q: In X-ray imaging, to achieve a well-defined small area of X-ray beam, the anode of the X-ray tube is…

A: In the following problem:  Angle,θ=15°  Distance between the X-ray source and the patient, d=30 cm…

Q: (a) What power contact lens is needed to correct the vision of a person who has a near point of 76.0…

A:

Q: Suppose a 150 mm focal length telephoto lens is being used to photograph mountains 11.0 km away. (a)…

A: Focal length of lens "f"= 150mm =150×10^-³m = 0.15 m  Object distance "u"= 11 km = 11×10^³m . height…

Q: A light-year (ly) is the distance light travels in one year (at speed of 2.998 ×× 108 m/sm/s ). An…

A: Given that:- Speed of light=2.998×10^8m/s

Q: In this experiment, the distances are p = xL - xO and q = xS - xL.  They satisfy the thin-lens…

A: f ( focal length) = 136 mm P( object distance) = f + e  e = 1.6 mm P = 136 mm + 1.6 mm = 137.6 mm We…

Q: You switch from a 60x oil immersion objective with an NA of 1.40 to a 40x air immersion objective…

A: Given data NA=1.40 Index of refraction, n=1.51

Q: A compound microscope with a 5 mm objective lens and an eyepiece with a bore length 30 mm and body…

A: Given, fo=5mmbody length L=18 cmBore length =30mm