Could someone that is smart please check my physics homework? - Help.com

Could someone that is smart please check my physics homework?

1. Why does the sky appear darker blue when you are at high altitudes?

a. There are more red-absorbing molecules in the air at high altitudes.
**b. There is less air above you and consequently less scattering of sunlight.
c. There is less sunshine at high altitudes than at lower altitudes.
d. There is less air above you and consequently more scattering of sunlight.

2. Some of the mirrors you might see in an amusement park make some parts of you seem large, while at the same time making other parts seem smaller. How is this accomplished?
I) The mirrors are curved outward
II) The mirrors are curved inward
III) The mirrors are flat
IV) The mirrors are distorted

**a. All of these
b. I and II only
c. I and IV only
d. II and IV only
e. I and III only
f. II and III only

3. A concave mirror with a radius of curvature of 1.0 m is used to collect light from a distant star. What is the distance between the mirror and the image of the star?

**a. d = 0.50 m
b. d = 1.0 m
c. d = 0.25 m
d. d = 2.0 m
e. d = 0.75 m

4. Why does the sun look red at sunrise and sunset but not at noon?

a. The sun itself is redat sunrise and sunset,but is yellow at noon; it has nothing to do with the effect of the atmosphere.
b. The sun is colder at sunrise and sunset than at noon.
c. Our eyes are more sensitive to the red light at sunrise and sunset than at noon.
**d. Red light is easily scattered through the air since its frequency is the lowest. At noon,sunlight travels through the least amount of atmosphere with little transmission of high frequency light to the surface.
e. Red light is easily transmitted through the air since its frequency is the lowest. At noon, sunlight travels through the least amount of atmosphere with little scattering of high-frequency light to the surface.
f. The temperature at noon is warmer than at sunrise and sunset.

5. Why are the security mirrors bowed outward?
I) to capture a wide field of view as possible
II) to focus the cash register
III) to focus the people

a. All of these
b. II only
**c. I only
d. III only

6. A pulse of red light and a pulse of blue light enter a glass block normal to its surface at the
same time. After passing through the block, which pulse exits first?

a. Violet light
b. Blue light
**c. Red light
d. Yellow light
e. Green light

7. If the sky on a certain planet in the solar system were normally orange, what color would sunset be?
a. orange
b. red
c. yellow
**d. blue
e. white
f. black

8. During a lunar eclipse, the moon is not completely dark, but is often a deep red in color.
Why?
a. High frequencies pass more easily through the long grazing path through the Earth’s atmosphere to be refracted finally onto the moon.
b. During the sunset, the Sun transfers some red light to the moon.
**c. Low frequencies pass more easily through the long grazing path through the Earth’s atmosphere to be refracted finally onto the moon.

Could someone that is smart please check my physics homework?

1. Why does the sky appear darker blue when you are at high altitudes?

a. There are more red-absorbing molecules in the air at high altitudes.
**b. There is less air above you and consequently less scattering of sunlight.
c. There is less sunshine at high altitudes than at lower altitudes.
d. There is less air above you and consequently more scattering of sunlight.

2. Some of the mirrors you might see in an amusement park make some parts of you seem large, while at the same time making other parts seem smaller. How is this accomplished?
I) The mirrors are curved outward
II) The mirrors are curved inward
III) The mirrors are flat
IV) The mirrors are distorted

**a. All of these
b. I and II only
c. I and IV only
d. II and IV only
e. I and III only
f. II and III only

3. A concave mirror with a radius of curvature of 1.0 m is used to collect light from a distant star. What is the distance between the mirror and the image of the star?

**a. d = 0.50 m
b. d = 1.0 m
c. d = 0.25 m
d. d = 2.0 m
e. d = 0.75 m

4. Why does the sun look red at sunrise and sunset but not at noon?

a. The sun itself is redat sunrise and sunset,but is yellow at noon; it has nothing to do with the effect of the atmosphere.
b. The sun is colder at sunrise and sunset than at noon.
c. Our eyes are more sensitive to the red light at sunrise and sunset than at noon.
**d. Red light is easily scattered through the air since its frequency is the lowest. At noon,sunlight travels through the least amount of atmosphere with little transmission of high frequency light to the surface.
e. Red light is easily transmitted through the air since its frequency is the lowest. At noon, sunlight travels through the least amount of atmosphere with little scattering of high-frequency light to the surface.
f. The temperature at noon is warmer than at sunrise and sunset.

5. A pulse of red light and a pulse of blue light enter a glass block normal to its surface at the
same time. After passing through the block, which pulse exits first?

a. Violet light
b. Blue light
**c. Red light
d. Yellow light
e. Green light

6. If the sky on a certain planet in the solar system were normally orange, what color would sunset be?
a. orange
b. red
c. yellow
**d. blue
e. white
f. black

7. During a lunar eclipse, the moon is not completely dark, but is often a deep red in color.
Why?
a. High frequencies pass more easily through the long grazing path through the Earth’s atmosphere to be refracted finally onto the moon.
b. During the sunset, the Sun transfers some red light to the moon.
**c. Low frequencies pass more easily through the long grazing path through the Earth’s atmosphere to be refracted finally onto the moon.