For Chemistry Tutorials
Introduction
 
Vectors
 
Mechanics
 
Energy Work Power
 
Impulse Momentum
 
Rotational Motion
 
Optics
 
Properties Of Matter
 
Heat Temperature And Thermal Expansion
 
Electrostatics
 
Electric Current
 
Magnetism
 
Waves
 
Exams and Problem Solutions
 
--Vectors Exam and Problem Solutions
 
--Kinematics Exams and Problem Solutions
 
--Dynamics Exams and Problem Solutions
 
--Work Power Energy Exams and Problem Solutions
 
--Impulse Momentum Exams and Problem Solutions
 
--Rotational Motion Exams and Problem Solutions
 
--Optics Exams and Problem Solutions
 
--Optics Exam1 and Problem Solutions
 
--Optics Exam2 and Problem Solutions
 
--Optics Exam3 and Problem Solutions
 
--Optics Exam4 and Problem Solutions
 
--Properties of Matter Exams and Problem Solutions
 
--Heat Temperature and Thermal Expansion Exams and Problem Solutions
 
--Electrostatics Exams and Problem Solutions
 
--Electric Current Exams and Problem Solutions
 
--Magnetism Exams and Problem Solutions
 
--Waves Exams and Problem Solutions
 
Old Version
 


Menu

Optics Exam3 and Problem Solutions


Optics Exam3 and  Problem Solutions

1. Ray I comes to optical system as shown in the figure given below. Ray reflects from the mirror placed inside the sphere in 1 direction. How much we must rotate mirror to make reflected ray follows path 2.

Since reflected ray rotates 450, mirror must rotate 22,50

45/2=22,50

2. An observer is placed at point O and an obstacle is placed at point A. Which points shown in the figure below can be seen by observer?

Picture, given below, shows which points are in the viewpoint of observer. Observer can only see image of object 3.

3. Draw reflection path of the following ray from plane mirror and concave mirror.

Path of the ray is given below.

4. An object is placed in front of a concave mirror. If the distance between object and its image is 48 cm, find the focal point of the mirror.(Himage=Hobject/3)

Since height of the image is smaller than height of the object, object must be placed away from the center of the mirror and image is formed between focal point and center of the mirror.

Himage=Hobject/3

dfobject-dfimage=48cm

Hobject/Himage=dfobject/f=3

dfobject=3f

Hobject/Himage=f/dfimage=3

dfimage=f/3

dfobject-dfimage=48cm

3f-f/3=48cm

f=18cm

5. As you can see in the picture given below, ray comes to the first mirror, reflects and hits second mirror. If this ray turns back on itself after reflecting from the second mirror, find the focal point of the second mirror.

Ray passes from the point A after reflecting from first mirror. We do our calculations by taking point A object of second mirror.

1/f=1/dobject-1/6

1/3+1/6=1/dobject

dobject=2m

Point A is the center of the second mirror.

V1V2=6m

Center of the second mirror=4m=2f

f=2m


Author:


© Copyright www.PhysicsTutorials.org, Reproduction in electronic and written form is expressly forbidden without written permission of www.PhysicsTutorials.org. Privacy Policy