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EM Waves Mixed Practice

Total questions: 20

Worksheet time: 16mins

Name
Class
Date
1.
What is an image called that forms when light rays actually meet
a)
virtual image
b)
real image
c)
diffuse reflection
d)
regular reflection
2.
When an object is placed between the focal point and the convex lens, the image produced is ___.
a)
real, reduced, and inverted
b)
real, enlarged, and inverted
c)
virtual, enlarged, and upright
d)
virtual, reduced, and upright
3.

What type of image is formed?

a)

virtual and inverted

b)

virtual and upright

c)

real and upright

d)

real and inverted

4.
Which of the figures represents reflection?
a)
A
b)
B
c)
C
d)
D
5.
Refraction is when light__________.
a)
Is bounced by an object or material.
b)
Changes speed as it travels in different materials which causes bending.
c)
When light speeds up to over 300,000 km/s
6.

Find the frequency of an electromagnetic wave with a wavelength 2.75 × 10–8 m. Remember c = f*λ and c = 3.00 x 108 m/s.

a)

1.10 Hz

b)

1.09 × 1016 Hz

c)

9.17 × 1015 Hz

d)

9.17 × 1016 Hz

7.

Mr. H catches the news on 780 AM, which broadcasts at 780. kHz (7.80 x 105 Hz). Determine the wavelength of these radio waves. Remember c = f*λ and c = 3.00 x 108 m/s.

a)

3.85 x 105 m

b)

385 m

c)

3.85 x 104 m

d)

3.85 x 106 m

8.

Which of the figures represents refraction?

a)

A

b)

B

c)

C

d)

D

9.

Your microwave is broken, so the food does not rotate while the microwave is on. You put your food in the microwave, and set the cook time for 3 minutes. After 3 minutes, you take out your food. Parts are hot. Parts are cold. You know that the microwave blasts your food with several different waves together at the same time to heat it up. What wave behavior best describes how these waves interact to create pockets of hot and cold in your food?

a)

Refraction

b)

Reflection

c)

Interference

d)

Polarization

10.
What does the word "converging" mean?
a)
to separate
b)
to come together
c)
parallel 
d)
perpendicular
11.
When an object is placed between the focal point and the convex lens, the image produced is ___.
a)
real, reduced, and inverted
b)
real, enlarged, and inverted
c)
virtual, enlarged, and upright
d)
virtual, reduced, and upright
12.
The dwill be a _________________ value.
a)
positive
b)
negative
13.
The dfor a real image will be a _________________ value
a)
positive
b)
negative
14.

What type of image is formed?

a)

virtual and inverted

b)

virtual and upright

c)

real and upright

d)

real and inverted

15.
___ is when light travels through a material and bends.
a)
Diffraction
b)
Dispersion
c)
Mirage
d)
Refraction
16.

In this diagram, which is the angle of incidence?

a)

Angle A

b)

Angle B

c)

Angle C

d)

Angle D

17.

Electromagnetic energy travels through space in waves. The electromagnetic spectrum includes all electromagnetic waves, arranged according to frequency and wavelength. Which of these is an example of an electromagnetic wave?

a)

Radio Wave

b)

Sound Wave

c)

Ocean Wave

d)

Earthquake Wave

18.

Electromagnetic energy travels in waves. These waves can vary in their frequencies and wavelengths. Electromagnetic energy is classified by the length and frequency of its wave. Of the four wave types below, which has the highest frequency?

a)

Microwaves

b)

Infrared waves

c)

gamma rays

d)

radio waves

19.
Which electromagnetic wave is responsible for cell phones?
a)
gamma
b)
xray
c)
microwaves
d)
radio
20.
Which EM wave is used to treat cancer?
a)
gamma
b)
radio
c)
xray
d)
infrared