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G10 Physics Q's
Review of concepts/questions for the Grade 10 (SNC2D) Optics unit
| Question | Answer |
|---|---|
| Higher frequency (f) means | Higher Energy (E), lower Wavelength (λ) |
| Lower frequency (f) | Lower Energy(E), Higher Wavelength(λ) |
| What is the range of the Electromagnetic spectrum? | 700nm (Red) to 400nm (Violet) |
| How many colours are in Visible Light? | 6 Colours |
| What is the wavelength of Red light? | 700nm |
| What is the wavelength of Green light? | 500nm |
| What is the wavelength of Purple light? | 400nm |
| What is the wavelength of Orange light? | 600nm |
| List the Electromagnetic spectrum in order of lowest to highest Energy (E) | Radio waves, Microwaves, Infrared, Visible, Ultra-violet, X-Ray, Gamma rays |
| Red + Green = | Yellow light |
| Blue + Red = | Magenta light |
| Green + Blue = | Cyan light |
| Black is complementary to | White light |
| White light is complementary to | Black light |
| Magenta light is complementary to | Green light |
| Yellow light is complementary to | Blue light |
| Cyan light is complementary to | Red light |
| If the Angle of incidence is 20°, what is the angle of reflection? | 20° |
| If the Critical angle is 45°, what is the angle of refraction? | 90° |
| If an object is placed before the Center of curvature of a Concave mirror, the image is | Between C and F, Inverted, Reduced, Real |
| If an object is placed at the Center of curvature of a Concave mirror, the image is | At C, Inverted, Same size, Real |
| If an object is placed at the Focal point of a Concave mirror, the image is | Does not exist |
| If an object is placed after the Focal point of a Concave mirror, the image is | Behind the mirror, Upright, Magnified, VIrtual |
| When virtual lines are drawn behind the mirror, we draw them | dotted |
| When real lines are drawn in front of the mirror, we draw them | solid |
| Where lines intersect (cross each other), other than at the Focal point, it is | The tip of the image |
| If an object is placed after the Focal point of a Concave mirror, instead of through the Focal point (F), one line goes through | The Vertex (V) and bounces off at the same angle it came. |
| Wherever the object is with a Convex mirror the image is | Behind the mirror, Upright, Reduced, Virtual |
| Larger angle of incidence = | larger angle of refraction |
| From less dense to more dense mediums, light bends | towards normal |
| From more dense to less dense mediums, light bends | away from normal |
| Wherever the object is with a Diverging lens the image is always | After F, Upright, Reduced, VIrtual |
| If an object is placed before the Focal point with a convex lens the Image will be | After the F on the viewers' side, Inverted, Magnified, Real |
| If an object is placed after the Focal point with a convex lens the Image will be | After the F, upright, reduced and virtual |
| What does diverge mean? | To move apart |
| What does converge mean | To come together |
| How does the human eye focus? | The ciliary muscle tugs on the lens, changing it's Focal point |
| What makes vision blurry? | When the Focal point of our eye is no on our Retina |
| What is Myopia? | Shortsightedness. Light focuses before the Retina and can be corrected with Diverging lens glasses |
| What is Hyperopia? | Farsightedness. Light focuses too late after Retina and can be corrected with Converging lens glasses |
| What is Presbyopia? | The Lens of eye becomes too stiff to focus anything. Happens in old age and corrected with "bifocal" glasses |
| What is Astigmatism? | Blurred vision due to incorrectly shaped Corneas |
Created by:
SupreethG
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