Basic Science

6 questions available

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All Basic Scientific Concepts 1 Matter 1 Energy 3 Force & Motion Heat & Temperature Light 6 Sound 4 Electricity 2 Magnetism
Showing 1–6 of 6

Q1.Rainbow is formed by?

Medium
A Reflection
B Refraction
C Scattering
D Dispersion
Light PPSC 2026

Correct Answer: D

A rainbow is formed by the dispersion of sunlight into its constituent colors as it passes through water droplets.

Q2.Electromagnetic Spectrum visible for human eye?

Medium
A 378-750 nm
B 400-800nm
C 45-850nm
D None of these
Light PPSC 2026

Correct Answer: A

The visible light spectrum for the human eye ranges approximately from 378 to 750 nanometers.

Q3.Sun rays are most reflected by which color?

Easy
A Red
B Black
C Blue
D White
Light PPSC 2025

Correct Answer: D

Q4.The term "light year" refers to:

Medium
A Time that Earth takes to complete one revolution around the Sun
B Distance of Earth from the Sun at which intensity of light is maximum
C Speed of light expressed in miles per year
D None of these
Light CSS 2023

Correct Answer: D

Correct Answer: None of these.

Q5.The waves which are used by the TV remote control are:

Medium
A Infrared waves
B Radio waves
C TV waves
D None of these
Light CSS 2022

Correct Answer: A

Correct Answer: Infrared waves.

Q6.Which light is more important for photosynthesis?

Medium
A Violet light
B Red light
C Green light
D None of these
Light CSS 2022

Correct Answer: B

Correct Answer: Red light.