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[answered] 1. The wavelength of an electromagnetic wave is measured to


I doing a review for physics 102 class and need help


1. The wavelength of an electromagnetic wave is measured to be 180 m.

 

(a) What is the frequency of the wave? XXX-kHz (b) What type of EM wave is it?

 

radio

 

microwave

 

infrared

 

visible light

 

ultraviolet

 

2. A small object is placed to the left of a convex lens and on its optical axis. The object is 30 cm from the

 

lens, which has a focal length of

 

47 cm.

 

If the object is moved to a position

 

38 cm

 

to the left of the lens, what will the image position be? (A positive value for p, or position, means the

 

image is on the right side of the lens.)

 

p = XXX- cm Describe the nature of this new image. (Select all that apply.)

 

virtual

 

real

 

upright

 

inverted

 

enlarged

 

reduced

 

on the left side of the lens

 

on the right side of the lens 3. A camera is equipped with a lens with a focal length of 36 cm. When an object 1.9 m (190 cm) away is

 

being photographed, what is the magnification?

 


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