Physic : Lenses/Mirrors MCQ Set-4

MCQ Set-4 1. An object is placed at a distance of 12 cm from a convex lens on its principal axis and a virtual image of certain size is formed. If the object is moved further 8 cm away from the lens, a real image of the same size as that of the virtual image …

Physic : Lenses/Mirrors MCQ Set-3

MCQ Set-3 1. What is the minimum distance between the convex lens and the object to produce a real image ? a.  0                          b.  f c.  2f                         d. 4f 2. What …

Physic : Lenses/Mirrors MCQ Set-2

MCQ Set-2 1. The ratio of the focal length of the objective to the focal length of the eyepiece is greater than one for a. a microscope b. a telescope c. both microscope and telescope d. neither microscope nor telescope 2. Why the colour of the ocean appears blue? a.  Because the sunlight falling on …

Physic : Light MCQ Set-4

MCQ Set-4 1. Which one of the following wavelengths of light is most effective in photosynthesis? a. Yellow b. Orange c. Blue d. Green 2. A person wears spectates with concave lenses. It means that normally (when not using glasses), the image of distant objects is focused in his eyes a. in front of the …

Physic : Light MCQ Set-3

MCQ Set-3 1. For a ray of light to suffer total internal reflection it has to pass from : a. glass to water b. air to glass c. water to glass d. air to water 2. The blue colour of water in the sea is due to a. reflection of blue sky by sea water …