Physics Past Questions, Answers, And Explanations - Physics

Physics Questions

Question 491:

An object is placed 10cm in front of a concave mirror of focal length 15cm. What is the position and nature of the image formed?

Question 492:

Which of the following phenomena explains the formation of a mirage? i. Reflection ii. Refraction iii. Diffraction

Question 493:

When white light is dispersed by a spectrometer, the component having the shortest wavelength is

Question 494:

Which of the following statement is TRUE of ultraviolet, visible and infra-red rays?

A They are all electromagnetic waves with the same wavelength
B Ultra-violet rays have shorter wavelengths than infra-red rays and produce flourescence
C Infrared rays have shorter wavelength than visible light and produce the sensation of heat
D The wavelenghts increase in the sequence: visible, ultra-violet, infra-red

Question 495:

A spectrum of sunlight is said to be impure when