Electromagnetic Waves and Optics Unit Test

1.

Multiple Choice

30 sec

1 pt

Your image behind a plane mirror is at a distance equal to

a. half your height.

b. half your distance from the mirror.

c. your distance in front of the mirror.

d. slightly more than your distance in front of the mirror.

2.

Multiple Choice

30 sec

1 pt

Refraction occurs when a light wave crosses a boundary and changes

speed and direction.

intensity.

frequency.

amplitude.

3.

Multiple Choice

30 sec

1 pt

The image formed by a convex mirror is

real and upright

real and inverted

virtual and upright

none of these

4.

Multiple Choice

30 sec

1 pt

Which has the SHORTEST wavelength and therefore the highest frequency/most energy? Hint: These waves are also used in cancer treatments.

Gamma Rays

Radio Waves

Ultraviolet Rays

X-rays

5.

Multiple Choice

30 sec

1 pt

Which has the LONGEST wavelength and therefore the lowest frequency/energy? These waves are used in TV broadcasting, Wifi, and texting.

Gamma rays

Visible light

Radio waves

Infrared rays

6.

Reorder

30 sec

5 pts

Reorder the following from shortest wavelength to the longest wavelength.

gamma waves

x-rays

ultraviolet waves

visible light

infrared rays

7.

Dropdown

1 min

1 pt

(a) reflection happens when light hits a completely smooth surface.

Specular

Diffuse

Refraction

Diffraction

8.

Multiple Choice

1 min

1 pt

When an object is placed on the focal point in front of a converging lens, the image produced is ___.

real, reduced, and inverted

real, enlarged, and inverted

real, true, and inverted

There is no image

9.

Multiple Choice

1 min

1 pt

This image is.....

inverted and smaller

inverted and larger

upright and smaller

upright and larger

10.

Reorder

1 min

5 pts

Arrange the colors of the visible light spectrum from highest wavelength to lowest wavelength.

Red

Orange

Yellow

Green

Blue

11.

Multiple Choice

30 sec

1 pt

The following is a picture of what type of mirror?

Convex Mirror

Concave Mirror

Plane Mirror

Flat Mirror

12.

Multiple Choice

30 sec

1 pt

An image that forms where light seems to come from a point but light rays don't actually meet is a

virtual image

real image

Inverted Image

clear image

13.

Math Response

2 mins

1 pt

Mathematical Equivalence

ON

14.

Math Response

2 mins

1 pt

The speed of light in an unknown medium is measured to be 2 x 10⁸ m/s. The speed of light in air is 3 x 10⁸ m/s. What is the index of refraction of the medium? (n = c/v)

Mathematical Equivalence

ON

15.

Multiple Choice

45 sec

1 pt

Which figure represents the path light takes through a converging lens?

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