光學 CH03

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光學CH03練習題

Problem 1

A parallel beam of white light is refracted by a 60° glass prism in a position of minimum deviation. What is the angular separation of emerging red (n = 1.525) and blue (1.535) light? (01小題)

the angular=_____
可嘗試次數(no. of submission)= 3

01

Problem 2

A prism of 60° refracting angle gives the following angles of minimum deviation when measured on a spectrometer:

C line, 38°20';

D line, 38°33';

F line, 39°12'.

Determine the dispersive power of the prism.

the dispersive power of the prism=_____
可嘗試次數(no. of submission)= 3

02

Problem 3

A telephoto lens consists of a combination of two thin lenses having focal lengths of \(+20 cm\) and \(-8 cm\), respectively. The lenses are separated by a distance of \(15 cm\). Determine the focal length of the combination, distance from negative lens to film plane, and image size of a distant object subtending an angle of \(2^0\) at the camera. (03小題)

the focal length of the combination=_____cm
可嘗試次數(no. of submission)= 3

03

the distance from negative lens to film plane=_____cm
可嘗試次數(no. of submission)= 3

04

the image size=_____cm
可嘗試次數(no. of submission)= 3

05

Problem 4

A magnifier is made of two thin plano-convex lenses, each of 3cm focal length and spaced 2.5cm apart. Find (a) the equivalent focal length and (b) the magnifying power for an image formed at near point of the eye. (02小題)

(a)the equivalent focal length=_____cm
可嘗試次數(no. of submission)= 3

06

(b)the magnifying power =_____
可嘗試次數(no. of submission)= 3

07

Problem 5

Two thin convex lenses, when placed 25cm apart, from a compound microscope whose apparent magnification is 20. If the focal length of the lens representing the eyepiece is 4cm, determine the focal length of the other. (01小題)

the focal length=_____cm
可嘗試次數(no. of submission)= 3

08

Problem 6

An opera glass uses an objective and eyepiece with focal lengths of +12cm and -4.0cm, respectively. Determine the length (lens separation) of the instrument and its magnifyity power for a viewer whose eyes are focused and (a) for infiniy and (b) for a near point of 30cm. (04小題)

(a)length=_____cm
可嘗試次數(no. of submission)= 3

09

power=_____
可嘗試次數(no. of submission)= 3

10

(b)length=______cm
可嘗試次數(no. of submission)= 3

11

power=______
可嘗試次數(no. of submission)= 3

12

Problem 7

An astronomical telescope is used to project a real image of the moon onto a screen 25cm from an ocular of 5cm focal length. How far must the ocular be moved from its normal position?

the distance=_____cm
可嘗試次數(no. of submission)= 3

13

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