General Science - Physics -11

141. The phenomenon of splitting of light into its constituents:

(a) Diffraction                                      (b) Interference

(c) Refraction                                       (d) Disperson

Answer: (d)

142. Which light has the longest wavelength?

(a) Violet                                               (b) Green

(c) Blue                                                  (d) Red

Answer: (d)

143. Which light has the shortest wavelength?

(a) Blue                                                   (b) Violet

(c) Red                                                    (d) Yellow

Answer: (b)

144. The surface that absorbs all the colours in the spectrum will be seen as:

(a) White                                                (b) Black

(c) Violet                                                 (d) Red

Answer: (b)

145. The surface that reflects all the colours in the spectrum will be seen as:

(a) Red                                                    (b) Yellow

(c) White                                                (d) Black

Answer: (c)

146. What is the colour of light used in automobiles during snow fall?

(a) Red                                                    (b) Green

(c) Blue                                                   (d) Yellow

Answer: (d)

147. A red flower in blue light will be seen as:

(a) Black                                                  (b) Red

(c) Blue                                                     (d) Violet

Answer: (a)

148. The speed of light is ...... km/s

(a) 3 million                                            (b) 3 lakh

(c) 3 crore                                                (d) 30 million

Answer: (b)

149. In the equation, E=MC2, ‘C’ stands for:

(a) Velocity of sound                         (b) Acceleration due to gravity

(c) Velocity of light                             (d) Refractive index

Answer: (c)

150. Particles faster than light:

(a) Tachyons                                         (b) Photons

(c) Neutrons                                          (d) Protons

Answer: (a)

151. Speed of light is ...... maximum in:

(a) Vacuum                                          (b) Water

(c) Steel                                                 (d) Glass

Answer: (a)

152. Colour of soap bubble is due to:

(a) Disperson                                         (b) Interference

(c) Diffraction                                          (d) Refraction

Answer: (b)

153. Change of path of light when it enters from one medium to another:

(a) Interference                                      (b) Disperson

(c) Refraction                                          (d) Diffraction

Answer: (c)

154. Mirage is due to:

(a) Refraction                                           (b) Diffraction

(c) Disperson                                            (d) None of these

Answer: (a)

155. Study of light:

(a) Accoustics                                           (b) Optics

(c) Horology                                             (d) Orology

Answer: (b)
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