Which one of the following statements is not correct?
A. The longest wavelength of light visible to human eye is about 700 nm
B. The shortest wavelength of light visible to human eye is about 400 nm
C. The wavelength of gamma rays is longer than that of X-rays
D. The ability of a telescope to form separable images of close objects is called its resolving power
Answer: Option C
This Question Belongs to Physics GK Chapter Wise >> Light
Which combination of colour is the most convenient during day and night time?
A. Orange and blue
B. White and black
C. Yellow and blue
D. Red and green
Lenses with two focal lengths are used by persons suffering from . . . . . . . .
A. Myopia and hypermetropia
B. Myopia or hypermetropia
C. Myopia but not hypermetropia
D. Hypermetropia but not myopia
Which one of the following statements regarding lenses is not correct?
A. A convex lens produces both real and virtual images
B. A concave lens produces both real and virtual images
C. A convex lens can produce images equal, greater and smaller than the size of the object
D. A concave lens always produces images smaller than the size of the object
A. Both 1 and 2
B. Only 1
C. Only 2
D. Neither 1 nor 2
Join The Discussion