assessment10

What image can be formed in a plane mirror shown the ray diagram below?

• Real, Upright                                          

• Virtual, Inverted                                      

• Real, Inverted

• Upright, Virtual

Plane mirror is mirror with a flat reflective surface having the the following qualitative characteristics such as, upright, virtual, left-right reversed, same distance from the mirror as the object distance and same size.

            If you stand in front of two adjacent large plane mirrors at    90degrees in a room, how many images will you see?

• 1

• 2

• 3

• 4

The following are some examples of useful applications of IR radiation:

1. Infrared photographs taken from a satellite with special films provide useful details of the vegetation on the Earth’s surface.

2. Infrared scanners are used to show the temperature variation of the body.

3. Infrared remote controls are used in TVs, video, cassette recorders, and other electronic appliances.

4. Some night-vision goggles use IR.

5. Some autofocus cameras have transmitters that sends out infrared pulses.

           According to the examples of useful applications of Infrared Radiation, what objects are used to display the temperature variation of the body that can be used for medical diagnosis?

• Eyes

• Infrared Scanners          

• Regular cameras               

• Night vision goggles

Ashtine stands 3.5-m tall in front of a plane mirror. What is the height of her image?

• 4.5 m       

• 3.0 m    

• 2.0 m   

• 3.5 m

A 40 cm object is placed in front of the plane mirror. What is the size of its image in the mirror?

• 15 cm             

• 30 cm                 

• 40 cm          

• 60 cm

Which is true on the statements between the relationship of frequency and wavelength of each electromagnetic wave?

I.             The wavelength increases, the frequency decreases

II.            The frequency increase, the wavelength decreases

III.          The longer the wavelength, the longer the frequency

IV.          The shorter the wavelength, the longer the frequency

• I and II only

• I, II and III only         

• I,III,IV

• I,II and IV

Which mirror concept explains why the word AMBULANCE is written in reverse in an ambulance car?

• Multiple image                                  

• Lateral inversion                               

• Virtual image and real image

• All of the above

What kind of mirror is used in automobiles and trucks to give the driver a wider area and smaller image of traffic behind him?

• Plane mirror

• Convex mirror

• Concave mirror

• Curved Mirror

What type of mirror do dentists usually use to clearly see the images of our teeth?

• Plane mirror    

• Convex mirror   

• Concave mirror   

• Curved Mirror

If you placed a number chart in front of a plane mirror, what numbers will you read properly in the mirror?

• 0, 1, 6, and 9      

• 0, 1 and 6       

• 6 and 9      

• 0 and 8