a plus periscopic lens is made in glass of refractive index 1.53 with one surface of radius 68.39mm. Find the focal length of the lens in mm
a plus periscopic lens is made in glass of refractive index 1.53 with one surface of...
A thin lens made of glass that has a refractive index equal to 1.60 has surfaces with radii of curvature that have magnitudes equal to 13.0 and 20.0 mm. 1) Find the smallest possible value of the focal length. (Express your answer to three significant figures.) mmmm 2) Find the second smallest possible value of the focal length. (Express your answer to three significant figures.) mmmm 3) Find the second greatest possible value of the focal length? (Express your answer...
22. (i) A concave surface with a radius of 4 cm separates two media of refractive index n1 1.00 and n2- 1.5. Find the primary focal length and the secondary focal length. (ii) A biconvex glass lens has radii of curvatures 12 cm and 18 cm. The refractive index of glass is 1.44. Calculate the focal length of the lens. (iii) The radii of both surfaces of an equi-convex lens of refractive index 1.6 are equal to 8.0 cm. Find...
2. A convex lens of focal length 24 cm and refractive index of glass is 1.5. Find the foca length of this lens if it is totally submerged into water of refractive index 1.33. A far sighted person cannot see objects clearly that are closer to the eye than 73 cm Determine the focal length of contact lenses that will enable this person to read a magazine at a distance of 25 cm. 4.
A lens-maker wants to make a magnifying glass of focal length 19 cm from a glass with refractive index 1.53. If the two lens surfaces have equal radii of curvature, what should that radius be?
A lens made from glass with an index of refraction of 1.66 had two convex surfaces, one with a radius of 30 cm and the other with a radius of 50 cm. What is the focal length of the lens if it is surrounded by air?
A certain thin lens is made of glass with refraction index ?lens=1.500. In air, where the index of refraction is 1.000, the lens has focal length ?0=15.5 cm. What is the focal length ? of the lens when immersed in water, where the index of refraction is 1.330?
A meniscus lens is made with the radius of curvature of the convex surface being 45.0 cm and the concave surface 25.0 cm. If the glass used has index of refraction 1.50, what is the focal length of this lens?
A certain thin lens is made of glass with refraction index nlens = 1.500. In air, where the index of refraction is 1.000, the lens has focal length f0 = 26.5 cm. What is the focal length f of the lens when immersed in oil, where the index of refraction is 1.460?
13. A thin glass plate with the refractive index n has to surfaces which are not exactly parallel. In the interference image obtained in the reflected light under nearly nor- mal incident angles the distance between the dark stripes is found to be Ar. The wavelength is . Find the angle a between the plate surfaces. (1p) 14. Total internal reflection is observed in glass (n=1.5) and in water (n=1.33) at identical incidence angles. In which case the penetration depth...
The focal length ____________ when the refractive index of the lens is increased and __________ when the curvature radius of the lens is increased. increases / increases decreases / increases increases / decreases decreases / decreases