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Q 1/10
Score 0
A student looks at her reflection on the convex side of a spoon. The image appears smaller but upright.
Which property of convex mirrors explains this observation?
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B. They diverge reflected light rays.
D. They disperse white light.
C. They refract light through the surface.
A. They converge light rays.
Q 2/10
Score 0
On a very hot day, a driver sees what appears to be water on the highway ahead, but it disappears upon reaching it.
This illusion is mainly caused by:
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C. Diffraction of light along the road
D. Polarization of sunlight
B. Refraction of light through air layers of different temperatures
A. Reflection of light from clouds
10 questions
Q.
A student looks at her reflection on the convex side of a spoon. The image appears smaller but upright.
Which property of convex mirrors explains this observation?
1
45 sec
Q.
On a very hot day, a driver sees what appears to be water on the highway ahead, but it disappears upon reaching it.
This illusion is mainly caused by:
2
45 sec
Q.
A red laser beam is directed toward two transparent sheets: one red and one green. The beam passes through the red sheet but is barely visible through the green sheet.
This occurs because:
3
45 sec
Q.
A blue shirt appears bright under sunlight but looks dull under yellowish indoor lighting.
Which statement best explains this?
4
45 sec
Q.
A weather report shows high-altitude cirrostratus clouds made of hexagonal ice crystals. Later that day, observers see bright spots on both sides of the Sun.
What phenomenon most likely occurred?
5
45 sec
Q.
Consider the following statements about rainbows:
I. A primary rainbow involves one internal reflection.
II. A secondary rainbow has reversed color order.
III. A secondary rainbow is brighter than a primary rainbow.
IV. Dispersion separates white light into component colors.
Which statements are correct?
6
45 sec
Q.
Supernumerary bows appear as faint extra bands inside the primary rainbow.
These bands provide evidence that light:
7
45 sec
Q.
Two clouds are observed:
Cloud A is thin and appears white.
Cloud B is thick and appears dark gray.
Which explanation is most scientifically accurate?
8
45 sec
Q.
Consider the statements:
I. Shorter wavelengths scatter more than longer wavelengths.
II. The atmosphere contains tiny particles and gas molecules.
III. The Sun emits only blue light at noon.
IV. Human eyes are more sensitive to blue than violet.
Which combination explains why the sky appears blue?
9
45 sec
Q.
An astronaut standing on the Moon would observe a black sky even when the Sun is shining.
Which explanation best generalizes Earth’s sky color phenomenon to this situation?
