Free Physics in Daily Life MCQs with Answers

261. The image formed in a compound microscope is_____________?

• A. erect
• B. inverted
• C. sometimes erect, sometimes inverted
• D. none

Explanation: The objective lens first forms an inverted real image, and the eyepiece magnifies it without reversing it again. Therefore the final image in a compound microscope is inverted relative to the object.

262. P Waves are also said to be __________ waves?

• A. Push-pull
• B. Side-side
• C. Up-down
• D. None of the above

Explanation: P waves are primary, longitudinal waves in which particles move back and forth parallel to the direction of travel, producing alternating pushes and pulls. S waves move side to side or up and down, so those are not P waves.

263. In general, the most destructive earthquake waves are the __________ ?

• A. P waves
• B. S waves
• C. Surface waves
• D. All of the above

Explanation: Surface waves travel along the Earth's surface and usually produce the largest ground motion, making them the most destructive earthquake waves. P waves arrive first but generally cause less damage.

264. What inspired reflecting road lights to be invented?

• A. Car door reflecting mirrors
• B. The light a cat's eyes gave off on a fence
• C. Sun light on steel posts on road sides
• D. The sun light on the windshield

Explanation: The idea was inspired by the bright reflection from a cat's eyes when light struck them, caused by a reflective layer behind the retina. This principle led to reflective road markers and lights that return vehicle headlights toward drivers.

265. The type of glass used in making lenses and prism is___________?

• A. Pyrex glass
• B. jena glass
• C. Flintglass
• D. Soft glass

Explanation: Flint glass is dense and has a high refractive index, making it suitable for optical lenses and prisms. Pyrex is valued mainly for heat resistance, while soft glass is not the standard optical choice.

266. The Reason for a Swimming Pool to appear Less Deep than the actual depth is__________?

• A. Refraction
• B. Light scattering
• C. Reflection
• D. Interference

Explanation: Light from the pool bottom bends away from the normal as it passes from water into air, making the apparent depth smaller than the real depth. This bending of light is refraction, not reflection or scattering.

267. Which statement about sound is true?

• A. Sound can't travel through vacuum
• B. Sound can't travel through glass
• C. Sound can't travel through water
• D. Non of theses

Explanation: Sound is a mechanical wave and needs a material medium, so it cannot travel through a vacuum. It can travel through solids such as glass and liquids such as water.

268. The luster of diamond is due to_________?

• A. Reflection
• B. Total internal reflection
• C. Refraction
• D. None of these

Explanation: Diamond has a high refractive index, so light entering it can undergo repeated total internal reflection, producing its characteristic brilliance or luster. Ordinary reflection alone does not account for this strong sparkle.

269. What are the primary colors of Pigment?

• A. White, Black, Blue
• B. Red, Yellow, Blue
• C. Red, Orange, Blue
• D. Red, Green, Blue

Explanation: The traditional primary pigments are red, yellow and blue, which can be mixed to produce a range of other colors. Red, green and blue are the primary colors of emitted light instead.

270. What are the primary colors of Light?

• A. White, Black, Blue
• B. Red, Yellow, Blue
• C. Red, Orange, Blue
• D. Red, Green, Blue

Explanation: The primary colors of additive light are red, green and blue, commonly abbreviated RGB. Combining them in suitable intensities produces white light.