MCQ: Light, Shadows & Reflections - UPSC MCQ

Explanation:

• When the sun rises in the east, it is positioned low in the sky.
• As a result, the sunlight comes from the eastward direction.
• Shadows are formed when an object blocks the path of light.
• Therefore, when the sun is in the east, your shadow will be cast in the opposite direction, which is towards the west.

Conclusion: When the sun rises in the east, your shadow will be seen on the West (Option B).In the morning, when the sun rises in the east, your shadow will be seen on the west, i.e. on the opposite side.

Explanation of Answer:
A source of light and an opaque object:
- Shadows are formed when an object blocks the path of light.
- An opaque object does not allow light to pass through it, thus creating a shadow.
- A translucent object allows some light to pass through, resulting in a partial or lighter shadow.
- A transparent object allows light to pass through completely, so it does not create a shadow.
- Therefore, the correct answer is C: A source of light and an opaque object is needed to see a shadow.A shadow is formed only when a source of light is obstructed by an opaque object.

When you look at yourself in a mirror, the image you see is called a reflection. It's like a copy of how you look, but in the mirror.

Luminous objects are objects like the sun or a torch that give out light on their own, helping us see other objects.

• When light falls on a mirror, it changes direction and bounces back. This is called reflection.
• Imagine light as a bouncing ball hitting a wall and coming back.
• The mirror acts like that wall for light. It reflects the light so we can see things in it, just like when you look at your face in a mirror.