Light Physics

A convex lens produces a _______ image whereas a concave lens produces a _______ image

• Virtual, real

• Virtual; diffused

• Real; refracted

• Real; virtual

Why does the straw appear to be bent?

• light is reflected

• light is absorbed

• light is turned

• light is refracted

How is light affected by an increase in the index of refraction?

• Its frequency increases
• Its frequency decreases
• Its speed increases
• Its speed decreases

Tags

NGSS.HS-PS4-1

Find the frequency of an electromagnetic wave with a wavelength 2.75 × 10^–8 m.

• 1.10 Hz

• 1.09 × 10¹⁶ Hz

• 9.17 × 10¹⁵ Hz

• 9.17 × 10¹⁶ Hz

Tags

NGSS.HS-PS4-1

Which of the following best describes the image formed by a concave mirror when the object is located somewhere between the focal point (F) and the center of curvature (C) of the mirror?

• virtual, upright and enlarged

• real, inverted and reduced

• virtual, upright and reduced

• real, inverted and enlarged

Lenses that are thinner in the middle than the edge:

• Convex

• Flat

• Concave

• Round

What property of waves stays constant during refraction?

• frequency
• wavelength
• speed
• amplitude

Tags

NGSS.HS-PS4-1

A dentist uses a small dental mirror to help magnify teeth in your mouth. What type of mirror is this?

• a convex mirror

• a concave mirror

• a convex lens

• a concave lens

lateral displacement is the

• perpendicular distance between the incident ray and the emergent ray

• angle between refracted ray and normal

• angle between emergent ray and normal

• none

A concave lens has a focal length of 15cm. At what distance should the object from the lens be placed so that it forms an image at 10cm from the lens?

• 15cm

• -10cm

• 30cm

• -30cm