Answers 26-27 LISD TX-Physics B-CR rev. 525Unit Test

Unit Test — Unit test Answers

26 verified answers

Free Preview

What does the index of refraction directly measure?

the angle between the incident ray and the normal line

the angle between the refracted ray and the normal line

the bending of light in a medium

the reflection of light in a medium

Free Preview

What are some applications of the field of spectroscopy? Select 5 options. for identifying elements in a samplefor determining the distance and velocity of galaxiesfor producing neon lightsfor determining types of chemical bondsfor use in medical imaging devicesfor killing bacteria in foods

for identifying elements in a sample

for determining the distance and velocity of galaxies

for producing neon lights

for determining types of chemical bonds

for use in medical imaging devices

for killing bacteria in foods

A spring supporting a mass of 30 kg compresses 0.6 m. How far does the spring compress when it supports a mass of 10 kg?

0.1 m

0.2 m

1.2 m

1.8 m

The emission spectrums are known for the elements below.What elements are in the unknown sample? Select 2 options. boronlithiumhydrogenheliumpotassium

boron

lithium

hydrogen

helium

potassium

A 12.0 cm object is 9.0 cm from a convex mirror that has a focal length of -4.5 cm. What is the distance of the image from the mirror?

–3 cm

–4 cm

3 cm

4 cm

Which shows the correct magnification equation?

StartFraction h Subscript I Baseline over h Subscript o Baseline EndFraction equals negative StartFraction d Subscript I Baseline over d Subscript o Baseline EndFraction.

StartFraction h Subscript I Baseline over h Subscript o Baseline EndFraction equals StartFraction d Subscript I Baseline over d Subscript o Baseline EndFraction.

StartFraction d Subscript I Baseline over d Subscript o Baseline EndFraction equals negative StartFraction h Subscript I Baseline over d Subscript o Baseline EndFraction.

StartFraction d Subscript I Baseline over d Subscript o Baseline EndFraction equals StartFraction h Subscript I Baseline over d Subscript o Baseline EndFraction.

The diagram shows an image of an object being reflected off a plane mirror.

Arnold makes a chart to summarize what happens when light interacts with matter and is reflected.Which idea does Arnold need to correct?

In specular reflection, reflected rays move in the same direction.

In scattering, light strikes particles in the atmosphere.

In diffuse reflection, reflected rays move in different directions.

In scattering, long wavelengths are scattered the most.

A ray diagram shows the ray passing from medium 1 to medium 2. After passing into medium 2, the ray bends away from the normal.

reflection with scattering in a medium

reflection without scattering in a medium

refraction with medium 1 denser than medium 2

refraction with medium 1 less dense than medium 2

When light from one source, X, strikes a metal, electrons are ejected. When light from another source, Y, strikes the same metal, electrons are not ejected.

Light from source X has a higher intensity than light from source Y.

Light from source X has a lower intensity than light from source Y.

Photons of light from source X carry more energy than photons of light from source Y.

Photons of light from source X carry less energy than photons of light from source Y.

A photon has 8.0 × 10–15 J of energy. Planck’s constant is 6.63 × 10–34 J•s.

1.21 × 1019 Hz

8.3 × 10–20 Hz

1.21 × 10–19 Hz

8.3 × 1020 Hz

Incident ray X passes parallel to the principal axis of a concave lens. Incident ray Y passes parallel to the principal axis of a convex lens.

Ray X continues moving in the same direction, and ray Y refracts and passes through the focal point located behind the lens.

Both rays refract and move as though they passed through the focal point.

Ray X appears as though it passed through the focal point in front of the lens, and ray Y passes through the focal point on the other side of the lens.

Both rays continue moving in the same direction.

Which idea did Isaac Newton’s experiments with light support?

Light is produced by the interaction of magnetic and electric fields.

Light is a wave because it has properties that are similar to radio waves.

Light is made of particles because it travels only in a straight path.

Light is a wave because it bends around barriers.

Dierdre drew a diagram to compare the three types of mirrors.

X: Curves inwardY: Image may be larger than objectZ: Image is always real

X: Image is always virtualY: Curves outwardZ: Image may be smaller than object

X: Image is always realY: Curves inwardZ: Image may be smaller than object

X: Curves outwardY: Image may be smaller than objectZ: Image is always virtual

What is the study of the spectra produced from the emission and absorption of electromagnetic radiation?

study of absorption spectrums

study of emission spectrum

nanotechnology

spectroscopy

Which lists the waves in order of wavelength, from longest to shortest?

X-rays, infrared, radio waves

infrared, visible light, gamma rays

ultraviolet, microwaves, visible light

radio waves, gamma rays, visible light

Which accurately explains concave and convex lenses?

With both concave and convex lenses, placement of the object dictates which side of the lense the image will appear.

With both concave and convex lenses, placement of the object does not dictate which side of the lense the image will appear.

With concave lenses, placement of the object does not dictate which side of the lense the image will appear, but with convex lenses, they do.

With convex lenses, placement of the object does not dictate which side of the lense the image will appear, but with concave lenses, they do.

Yellow light has a frequency of 5.2 × 1014 Hz and travels at a speed of 3.0 × 108 m/s. What is the wavelength of yellow light, in meters?

5.8 × 10–7 m

2.2 × 10–6 m

1.7 × 106 m

8.2 × 1022 m

A patient is receiving treatments for brain cancer. Which electromagnetic waves are most likely being used as part of the treatment?

infrared

ultraviolet

microwave

gamma ray

Which is a correct description of Hooke’s law?

The force applied to a spring equals the product of the spring constant and the displacement.

The force applied to a spring equals the spring constant divided by the displacement.

The spring constant of a spring equals the product of the force applied and the displacement.

The spring constant of a spring equals the displacement divided by the force applied.

Did you find these answers helpful?

Unit Test — Unit test Answers

More from this Course

TRY EDGENUITY HACKS