PHYSICS 1260 EXAM 3 DEWITT
QUESTIONS AND ANSWERS GRADED A+
2025/2026
Most waves in the electromagnetic spectrum are... - ANS Invisible
Electromagnetic waves consist of... - ANS Oscillating electric and magnetic fields
Which of the following cannot travel in a vacuum (free space)? - ANS Sound waves
The fact that you can see stars in the nighttime sky is evidence that... - ANS Our atmosphere
is transparent to visible light and light can travel in a vacuum
Light is reflected when... - ANS Incident light is returned to the medium from which it came
When sunlight illuminates a page from your book it... - ANS Reflects most of it and absorbs at
the text lettering
Light travels from one place to another along a path of least... - ANS Time
Fermat's Principle applies to both... - ANS Reflection and Refraction
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
, The inversion of your image in a plane mirror is actually an inversion of... - ANS Left-Right and
Front-Back
Refraction occurs when light passing from one medium to another... - ANS Changes speed
When a light ray in air enters water at 15 degrees from the normal it... - ANS Always bends
toward the normal
Which are the consequences of different speeds of light in different media? - ANS Mirages,
Rainbows, Brilliant colors of diamonds
The type of lens that SPREADS parallel light is a... - ANS Diverging Lens
The type of lens that BRINGS parallel light together is a... - ANS Converging Lens
Snell's Law: From LOW n to HIGH n, a transmitted ray is bent, or refracted... - ANS Toward the
normal
Snell's Law: From HIGH n to LOW n, a transmitted ray is bent, or refracted... - ANS Away from
the normal
The index of refraction from crown glass, common in eyeglasses, is 1.52. The index of refraction
of a particular plastic lens is 1.76. Light bends more in the... - ANS Plastic lens
The image of the "infinitely-far-away" Sun produced by a converging lens appears... - ANS At
the focal point
A "pinhole camera" has no lens. The tiny pinhole opening ensures that rays of light from
different parts of an object... - ANS Don't overlap
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
QUESTIONS AND ANSWERS GRADED A+
2025/2026
Most waves in the electromagnetic spectrum are... - ANS Invisible
Electromagnetic waves consist of... - ANS Oscillating electric and magnetic fields
Which of the following cannot travel in a vacuum (free space)? - ANS Sound waves
The fact that you can see stars in the nighttime sky is evidence that... - ANS Our atmosphere
is transparent to visible light and light can travel in a vacuum
Light is reflected when... - ANS Incident light is returned to the medium from which it came
When sunlight illuminates a page from your book it... - ANS Reflects most of it and absorbs at
the text lettering
Light travels from one place to another along a path of least... - ANS Time
Fermat's Principle applies to both... - ANS Reflection and Refraction
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
, The inversion of your image in a plane mirror is actually an inversion of... - ANS Left-Right and
Front-Back
Refraction occurs when light passing from one medium to another... - ANS Changes speed
When a light ray in air enters water at 15 degrees from the normal it... - ANS Always bends
toward the normal
Which are the consequences of different speeds of light in different media? - ANS Mirages,
Rainbows, Brilliant colors of diamonds
The type of lens that SPREADS parallel light is a... - ANS Diverging Lens
The type of lens that BRINGS parallel light together is a... - ANS Converging Lens
Snell's Law: From LOW n to HIGH n, a transmitted ray is bent, or refracted... - ANS Toward the
normal
Snell's Law: From HIGH n to LOW n, a transmitted ray is bent, or refracted... - ANS Away from
the normal
The index of refraction from crown glass, common in eyeglasses, is 1.52. The index of refraction
of a particular plastic lens is 1.76. Light bends more in the... - ANS Plastic lens
The image of the "infinitely-far-away" Sun produced by a converging lens appears... - ANS At
the focal point
A "pinhole camera" has no lens. The tiny pinhole opening ensures that rays of light from
different parts of an object... - ANS Don't overlap
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
